IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0812093
(2015-07-29)
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| 등록번호 |
US-9872542
(2018-01-23)
|
|
발명자
/ 주소 |
- Barker, James R.
- Gallant, Christopher M.
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| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
188 |
초록
▼
A method of making a sheet-form loop-engageable fastener product includes placing a layer of staple fibers on a first side of a substrate, needling fibers of the layer through the substrate to form loops extending from a second side of the substrate, removing end regions from at least some of the lo
A method of making a sheet-form loop-engageable fastener product includes placing a layer of staple fibers on a first side of a substrate, needling fibers of the layer through the substrate to form loops extending from a second side of the substrate, removing end regions from at least some of the loops to form stems, and forming loop-engageable heads at free ends of at least some of the stems.
대표청구항
▼
1. A method of making a sheet-form loop-engageable fastener product, the method comprising placing a layer of drawn staple fibers having a titer of 60-600 dtex on a first side of a substrate;needling fibers of the layer through the substrate by penetrating the substrate with needles that drag portio
1. A method of making a sheet-form loop-engageable fastener product, the method comprising placing a layer of drawn staple fibers having a titer of 60-600 dtex on a first side of a substrate;needling fibers of the layer through the substrate by penetrating the substrate with needles that drag portions of the fibers through the substrate during needling, leaving exposed loops of the fibers extending from a second side of the substrate;removing end regions from at least some of the loops to form stems; andforming loop-engageable heads at free ends of at least some of the stems. 2. The method according to claim 1, further comprising anchoring fibers forming the loops by fusing the fibers to each other on the first side of the substrate, while substantially preventing fusion of the fibers on the second side of the substrate. 3. The method according to claim 1, wherein the needles are sized so that no more than one fiber is needled through the substrate per needle. 4. The method according to claim 3, further comprising matching the needles to the fibers so that each of the needles captures no more than one fiber per needle stroke. 5. The method according to claim 3, wherein the needles are fork needles, each fork needle having a recess formed between tines. 6. The method according to claim 5, wherein the recess of each needle has a width that is about 75% to about 125% of a diameter of a circle that circumscribes the fibers. 7. The method according to claim 1, wherein staple fibers have a titer of 60-110 dtex. 8. The method according to claim 7, wherein the recess of each needle has a width of 80-100 microns to capture a single fiber having a titer of 60-110 dtex. 9. The method according to claim 1, wherein the staple fibers are disposed on the substrate in a carded, unbonded state. 10. The method according to claim 1, wherein the substrate comprises a nonwoven web. 11. The method according to claim 1, wherein the loops formed on the second side of the substrate are formed such that substantially only one loop protrudes through each hole in the substrate so that the loops extend substantially perpendicular to the substrate. 12. The method according to claim 1, wherein removing end regions from at least some of the loops to form stems comprises cutting the end regions off with a blade. 13. The method according to claim 1, wherein forming loop-engageable heads at the ends of at least some of the stems comprises melting the ends of the at least some of the stems. 14. The method according to claim 1, wherein removing end regions and forming loop-engageable heads are performed substantially simultaneously using a single device. 15. The method according to claim 1, wherein needling fibers of the layer through the substrate comprises needling fibers to form taller loops and needling fibers to form shorter loops having a second height, and end regions of the taller loops are removed to form the stems. 16. The method according to claim 15, wherein needling fibers to form taller loops and needling fibers to form shorter loops having a second height comprises using different sized needles disposed along a common needle board. 17. The method according to claim 15, wherein the loops and the stems with loop-engageable heads are substantially evenly distributed along the substrate. 18. The method according to claim 15, wherein the ratio of loops to stems with loop-engageable heads disposed along the substrate is 1:1 to 3:1. 19. The method according to claim 15, wherein the first height is 5-8 mm and the second height is 2-4 mm. 20. The method according to claim 15, wherein discrete patterns of larger loops are formed during needling to form pairs of stems with loop-engageable heads along the substrate. 21. The method according to claim 1, wherein needling the fibers of the layer through the substrate comprises selectively needling the fibers to form discrete regions of loops. 22. The method according to claim 21, wherein the discrete regions comprise islands that include groupings of multiple loops that are surrounded by regions free of loops. 23. The method according to claim 21, wherein the discrete regions comprise lanes of loops, the lanes being separated by parallel regions that are free of loops. 24. The method according to claim 21, wherein selectively needling the fibers to form discrete regions of loops comprises moving needles different distances with respect to the substrate such that a first portion of needles push some fibers through the substrate to form the loops and a second portion of needles do not penetrate the substrate. 25. The method according to claim 21, wherein selectively needing the fibers to form discrete regions of loops comprises using needle boards having discrete regions of needles that are separated by regions that are free of needles. 26. The method according to claim 1, wherein a ratio of a pre-drawn length to a final length of the drawn staple fibers is 1:4.5 to 1:5.5. 27. The method according to claim 26, wherein the drawn staple fibers are formed of polypropylene.
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