Enhanced co-formed/meltblown fibrous web structure

Patent metadata

Field	Value
Publication number	US-9944047-B2
Application number	US-201615197895-A
Country	US
Kind code	B2
Filing date	Jun 30, 2016
Priority date	Jun 30, 2015
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

An enhanced, co-formed fibrous web structure is disclosed. The web structure may have a co-formed core layer sandwiched between two scrim layers. The core layer may be formed of a blend of cellulose pulp fibers and melt spun filaments. The scrim layers may be formed of melt spun filaments. Filaments of one or both of the scrim layers, and optionally the core layer, may also be meltblown filaments. The fibrous web structure may have a Consumer Preference Indication (governing allocation of melt spun filaments between core layer and scrim layers) greater than 0. Alternatively, the filaments forming the scrim layers may constitute from 1 to 13 percent of the weight of the structure. Alternatively, the scrim layers may have a combined basis weight of from 0.1 gsm to less than 3.0 gsm. A method for forming the structure, including direct formation of layers, is also disclosed.

First claim

What is claimed is:

1. A container comprising:
a stack of pre-moistened wet wipes, wherein the stack has a height from about 50 mm to about 300 mm, and wherein a majority of the pre-moistened wet wipes each comprises:
a fibrous web structure comprising:
from 10 percent by weight to 40 percent by weight meltspun polymer filaments; and
from 60 percent by weight to 90 percent by weight cellulose pulp fibers;
wherein the fibrous web structure has first and second outer scrim layers formed of a first portion of the meltspun polymer filaments, and an inner core layer formed of the pulp fibers intermixed with a second portion of the meltspun polymer filaments, at least one of the scrim layers having a basis weight of from 0.1 gsm to less than 3.0 gsm;
wherein the fibrous web structure bears an impressed pattern of thermal bonds at which meltspun polymer filaments of each of the first and second outer scrim layers are deformed and fused;
wherein the thermal bonds occupy from 2 percent to 12 percent of the surface area of the fibrous web structure on one side thereof; and
wherein from about 1.0 percent by weight of the fibrous web structure to about 13 percent by weight of the fibrous web structure of the meltblown filaments are allocated to the scrim layers.

2. The container of claim 1 , wherein the majority of the pre-moistened wet wipes each have a Consumer Preference Indication greater than 0.

3. The container of claim 1 , wherein the cellulose pulp fibers comprise wood pulp fibers.

4. The container of claim 1 , wherein the polymer filaments comprise predominately polyolefin.

5. The container of claim 4 , wherein the polyolefin comprises predominately polypropylene.

6. The container of claim 1 , wherein the meltspun polymer filaments forming the first and second outer scrim layers comprise polymers of like chemistry.

7. The container of claim 1 , wherein the cellulose pulp fibers comprise softwood pulp fibers.

8. The container of claim 1 , wherein the cellulose pulp fibers comprise hardwood pulp fibers.

9. The container of claim 1 , wherein at least some of the first portion of the meltspun polymer filaments have been mist-quenched.

10. The container of claim 1 , wherein the first and second outer scrim layers each has a basis weight equal to or greater than 0.1 gsm.

11. The container of claim 10 , wherein the first and second outer scrim layers each has a basis weight less than 3.0 gsm.

12. The container of claim 1 , wherein at least the first portion of the meltspun polymer filaments comprises meltblown filaments.

13. The container of claim 1 , wherein the container comprises a plastic tub.

14. The container of claim 1 , wherein the container comprises a film wrapper.

15. The container of claim 1 , wherein the majority of the pre-moistened wet wipes each comprises:
a lotion; and
water.

16. A container comprising:
a stack of pre-moistened wet wipes, wherein the stack has a height from about 75 mm to about 200 mm, and wherein a majority of the pre-moistened wet wipes each comprises:
a fibrous web structure comprising:
from 10 percent by weight to 40 percent by weight meltspun polymer filaments;
from 60 percent by weight to 90 percent by weight cellulose pulp fibers;
wherein the fibrous web structure has first and second outer scrim layers formed of a first portion of the meltspun polymer filaments, and an inner core layer formed of the pulp fibers intermixed with a second portion of the meltspun polymer filaments, at least one of the scrim layers having a basis weight of from 0.1 gsm to less than 3.0 gsm; and

a liquid composition
wherein from about 1.0 percent by weight of the fibrous web structure to about 13 percent by weight of the fibrous web structure of the meltblown filaments are allocated to the scrim layers.

17. A container comprising:
a stack of pre-moistened baby wipes, wherein the stack has a height from about 50 mm to about 300 mm, and wherein a majority of the pre-moistened baby wipes each comprises:
a fibrous web structure comprising:
from 10 percent by weight to 40 percent by weight meltspun polymer filaments;
from 60 percent by weight to 90 percent by weight cellulose pulp fibers;

wherein the fibrous web structure has first and second outer scrim layers formed of a first portion of the meltspun polymer filaments, and an inner core layer formed of the pulp fibers intermixed with a second portion of the meltspun polymer filaments, at least one of the scrim layers having a basis weight of from 0.1 gsm to less than 3.0 gsm;
a lotion; and
water
wherein from about 1.0 percent by weight of the fibrous web structure to about 13 percent by weight of the fibrous web structure of the meltblown filaments are allocated to the scrim layers.

18. The container of claim 17 , wherein the container comprises a plastic tub or a film wrapper.

Assignees

• Procter & Gamble

Inventors

• Burt Adam James
• Cameron Christopher Scott

Classifications

• B32B2432/00

  Cleaning articles, e.g. mops or wipes · CPC title

• B32B2262/0253

  Polyolefin fibres · CPC title

• B32B2262/062

  Cellulose fibres, e.g. cotton · CPC title

• B32B2250/20

  All layers being fibrous or filamentary · CPC title

• B32B2250/03

  3 layers · CPC title