Needling through carrier sheets to form loops

A sheet and carrier technology, applied in the direction of acupuncture machines, synthetic resin layered products, and other household appliances, can solve problems that affect the overall performance of ring materials or the bearing capacity of ring products, dimensional stability and processing efficiency

Active Publication Date: 2006-03-29
VELCRO IP HLDG LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Reducing the fiber content can reduce the cost, but it will also affect the overall performance or load-carrying capacity of the ring material, as well as the dimensional stability and processing efficiency of the ring product

Method used

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  • Needling through carrier sheets to form loops
  • Needling through carrier sheets to form loops
  • Needling through carrier sheets to form loops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] First, according to figure 1 , as the film sheet 14 is continuously unwound from the spool 16, the carded layer 10 of fibers 12 is placed over it. The fibers 12 and film 14 are then fed to a needling station 18 where the film is pierced from the fiber side. The needles are guided through the template 19 above the fibers and the fibers are pulled through the film forming a loop on the back of the film. During needling, the film is supported on a bed of nails 20 which extends from a drive support belt 22 which is able to move through the needling station with the film, which is supported on a screen or by a standard lower pallet (not shown) support. A stationary reaction plate 24 located below the belt 22 provides reaction pressure during needling. After needling is complete, with the film still on the bed of nails 20 , the backing film 26 is placed on the fiber side of the film 14 and the two film sheets are bonded together under the pressure of heated rollers 28 towa...

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Abstract

A loop fastener product is formed by needling a batt of fibers (12) through a carrier sheet such as a plastic film, to form loops (40) on the other side of the carrier sheet (14). A binder (46), such as a powder resin or plastic film, is placed over the fiber side of the product and fused to the carrier sheet (14) to bond the fibers (12) in place. In some cases the product is needled in only discrete areas, leaving other areas free of loops (40). The product may be formed into outer covers for disposable diapers. Fibers (12) of one resin are readily combined with films and backings of other resins to produce particularly thin and low weight loop materials.

Description

technical field [0001] The present invention relates to a method of making a loop article with a hook-and-loop fastener, and an article made by the method. Background technique [0002] Contact fasteners are particularly suitable as a fastening system for lightweight disposable garments such as diapers. In the effort to provide an economical loop material, there have been some proposals for alternatives to weaving, such as by needling lightweight, fibrous nonwoven felts. Some of these needle felts are then drawn for lighter basis weight and cost-effectiveness, where the loop structure is fixed by different bonding methods. For example, US6329016 describes such a method. [0003] Reducing fiber content can reduce costs, but also affects the overall performance or load-carrying capacity of the ring material, as well as the dimensional stability and processing efficiency of the ring product. The choice of fiber material is also often influenced by the need for the loop mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44B18/00B32B3/06B32B5/06D04H11/00D04H11/08
CPCB32B5/06A44B18/0011D04H11/08D04H11/00D04H18/02B32B3/08B32B33/00B32B27/32B32B3/266B32B2038/008B32B2307/72B32B2262/02B32B27/12B32B2309/105B32B2555/02
Inventor 乔治·A·普罗沃斯特威廉·H·谢泼德
Owner VELCRO IP HLDG LLC
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