Unlock instant, AI-driven research and patent intelligence for your innovation.

Liquid barrier nonwoven fabric with ribbon-like fibers

A non-woven fabric, non-woven technology, applied in the direction of non-woven fabrics, textiles and paper, household appliances, etc., can solve the problems of undisclosed low surface tension liquid resistance or improvement of air permeability

Active Publication Date: 2016-10-19
POLYMER GROUP INC
View PDF11 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Webb et al. Undisclosed improvements in low surface tension liquid resistance or breathability

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid barrier nonwoven fabric with ribbon-like fibers
  • Liquid barrier nonwoven fabric with ribbon-like fibers
  • Liquid barrier nonwoven fabric with ribbon-like fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] experiment method

[0089] base weigh

[0090] Basis weights for the following examples were measured using methods consistent with ASTM D756 and EDANA ERT-40, 3-90 test methods. The result is in g / m of mass per unit area 2 (gsm) and were obtained by weighing a minimum of ten 10 cm x 10 cm samples of each of the following Comparative Examples and Examples.

[0091] breathable sex

[0092] Air permeability data were generated using a TexTest FX3300 air permeability tester manufactured by TexTest AG (Zurich, Switzerland). Accordingly, a TexTest FX3300 air permeability tester was used according to the test method ASTM D-737 test method using a 38 mm orifice and a pressure drop of 125 Pa according to the manufacturer's instructions. The readings are made on the single-layer sheet or layer samples and the double-layer sheet or layer samples of the comparative examples and examples below, and are expressed in units of m 3 / m 2 / min records the results.

[0093] ...

Embodiment 7

[0131] Example 7 was made using the same production beams as Comparative Example 1, except that the first and fourth production beams included spinnerets comprising capillaries with ribbon-like geometry, as indicated above. Thus, Example 7 included two spunbond layers of ribbon-shaped spunbond fibers rather than round spunbond fibers. While the polymer output for the first and fourth production beams was kept about the same as those used in Comparative Example 1, some of the other spinning conditions (such as the volume of cooling air) had to be adjusted to achieve process stability sex. The total basis weight measurements, calculated basis weights per ply, and average fiber size measurements (according to Fiber Size Test Method 1) for Example 7 are reproduced in Table 4 below:

[0132]

Embodiment 8

[0134] Example 8 was produced in the same manner as Example 7, except that Bonding Pattern B was used. The calculated total basis weight for Example 8 is the same as that for Example 7. In addition, each S / M / M / S layer of Example 8 has the same calculated basis weight as Example 7, as shown in Table 4. Fiber Size Test Method 1 was used to measure the average fiber size of the fibers made from beams 1, 2, 3, and 4 in Example 8, which were the same as in Example 7, and are shown in Table 4 above.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Basis weightaaaaaaaaaa
melt flow indexaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

A nonwoven fabric for use as a component in a personal hygiene product and as a nonwoven personal hygiene component substantially free or free of non-ribbon (eg round) spunbond fibers and comprising intervening ribbon spunbond layers And the meltblown layer in direct contact with it. The meltblown layer has a basis weight of at least about 0.008 gsm and no greater than about 5 gsm, and the nonwoven fabric or component has a basis weight of at least about 8 gsm and no greater than about 40 gsm at 10% cumulative filter flow A pore size of less than or equal to about 27 microns when measured. The nonwoven fabric may also have a low surface tension liquid breakthrough flow of less than 0.9 ml / s, a low surface tension liquid breakthrough flow to air permeability ratio of greater than or equal to about 0.016, or both. Personal hygiene articles may comprise such nonwoven fabrics or components.

Description

technical field [0001] The present invention relates to fibrous nonwoven fabrics useful as liquid barrier fabrics in personal hygiene products, in particular nonwoven fabrics comprising a strip-shaped spunbond layer in direct contact with at least one intervening meltblown layer. The nonwoven fabrics of the present invention exhibit enhanced low surface tension liquid resistance and breathability. Background technique [0002] Nonwoven absorbent articles such as disposable diapers, training pants, incontinence pads, and feminine hygiene products have used nonwoven fabrics in many aspects, such as liners, transfer layers, absorbent media, liners, and the like. For many of these applications, the barrier properties of nonwovens can play a significant role. For example, US Patent No. 5,085,654 to Buell discloses a disposable diaper with breathable leg cuffs formed from a material such as a thermoplastic film that allow the passage of vapor while tending to retard the passage o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/24B32B27/02B32B27/32
CPCA61F13/47B32B5/022B32B7/12D04H1/4291D04H1/43912D04H1/43918B32B5/26D04H3/018D04H13/00B32B2262/0253B32B2307/724B32B2555/00B32B2555/02
Inventor C.F.维金斯P.D.格伦丁R.A.穆迪三世J.F.斯蒂芬
Owner POLYMER GROUP INC