Classifications

• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
  • B29D28/00—Producing nets or the like, e.g. meshes, lattices
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0046—Fasteners made integrally of plastics
  • A44B18/0049—Fasteners made integrally of plastics obtained by moulding processes
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0046—Fasteners made integrally of plastics
  • A44B18/0053—Fasteners made integrally of plastics in which each part has similar elements
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0046—Fasteners made integrally of plastics
  • A44B18/0061—Male or hook elements
• • A—HUMAN NECESSITIES
  • A44—HABERDASHERY; JEWELLERY
  • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
  • A44B18/00—Fasteners of the touch-and-close type; Making such fasteners
  • A44B18/0069—Details
  • A44B18/0084—Double-sided
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/727—Fastening elements
  • B29L2031/729—Hook and loop-type fasteners

Definitions

• FIGURE 8 is an enlarged fragmentary sectional view of an alternative embodiment hook portion that can be made according to the present invention.
• FIGURE 9 is a perspective view of another netting in accordance with the present invention.
• a first embodiment method for forming a reticulated mesh or netting, such as that of Fig 4, is schematically illustrated in Fig.1.
• the method includes first extruding a strip 50 such as the strip 1, shown in Fig. 2, of thermoplastic resin from an extruder 51 through a die 52 having an opening cut, for example, by electron discharge machining, shaped to form the strip 50 with a base 3, and elongate spaced ribs 2 projecting from at least one surface 5 of the base layer 3 that have a predetermined cross sectional shape.
• the strip can be stretched prior to cutting to provide further molecular orientation to the polymers forming the base layer 3 or ribs 2 and reducing the size of the ridges or ribs 2 or base layer thickness 12 and also reducing the size of the strands 9 formed by slitting of the base layer 3.
• the cutter 58 can cut using any conventional means such as reciprocating or rotating blades, lasers, or water jets, however preferably it cuts using blades oriented at an angle of about 60 to 90 degrees with respect to lengthwise extension of the ribs 2.
• the die 52 in Fig. 1 can be a single layer die so as to form a single layer strip with the base layer and first and optionally a second set of ribs formed of the same thermoplastic resin.
• the die 52 can be a multiple layer die where each of the base layer, the first set of ribs, and the optional second set of ribs can be formed of a separate thermoplastic resin andor each of the base layer or set of rib layer(s) could be formed of multiple layers of thermoplastic resin.
• Inelastic layers are preferably formed of semicrystalline or amorphous polymer or blends.
• Inelastic layers can be polyolefinic, formed predominately of polymers such as polyethylene, polypropylene, polybutylene, polyethylene-polypropylene copolymer.
• Fig. 9 shows an embodiment 80 where the secondary ribs 81 are not in the form of hooks in their cross sectional profile. This will result in stems being formed on the secondary strands 89 that could be subsequently formed into hook elements such as by the method described in U.S. Patent Nos. 6,368,097 and 6,132,660, the substance of which is incorporated herein by reference.
• Dynamic Shear The dynamic shear test was used to measure the amount of force required to shear the sample of mechanical fastener hook material from a sample of loop fastener material.
• a 2.5 cm x 7.5 cm loop sample was cut with the short dimension being the machine direction of the hook.
• This loop sample was then reinforced with 3M strapping tape on the backside of the loop.
• a 1.25 cm x 2.5 cm hook sample was also prepared. The long dimension is the machine direction of the hook.
• This sample was laminated to the end of a tab of 3M strapping tape 2.5 cm wide x 7.5 cm long. The strapping tape was doubled over on itself on the end without hook to cover the adhesive.
• hook materials were measured using a Leica microscope equipped with a zoom lens at a magnification of approximately 25X. The samples were placed on a x-y moveable stage and measured via stage movement to the nearest micron. A minimum of 3 replicates were used and averaged for each dimension.
• hook width is indicated by distance 27
• hook height is indicated by distance 30
• arm droop is indicated by distance 24
• hook thickness is indicated by distance 25.
• Table 1 The dimensions of the hook materials of the invention are shown in Table 1 below.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
• Extrusion Moulding Of Plastics Or The Like (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
• Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)

Priority Applications (4)

Applications Claiming Priority (4)

Publications (1)

Family

ID=32965315

Family Applications (1)

Country Status (8)

Cited By (8)

Families Citing this family (10)

Citations (4)

Family Cites Families (28)

• 2004
  • 2004-01-05 BR BRPI0407823-3A patent/BRPI0407823A/pt not_active IP Right Cessation
  • 2004-01-05 EP EP04700194A patent/EP1596683A1/en not_active Withdrawn
  • 2004-01-05 MX MXPA05009013A patent/MXPA05009013A/es active IP Right Grant
  • 2004-01-05 WO PCT/US2004/000041 patent/WO2004077980A1/en not_active Ceased
  • 2004-01-05 KR KR1020057016013A patent/KR20050107467A/ko not_active Ceased
  • 2004-01-05 RU RU2005126759/12A patent/RU2005126759A/ru not_active Application Discontinuation
  • 2004-01-05 JP JP2006508585A patent/JP4991285B2/ja not_active Expired - Fee Related
• 2007
  • 2007-05-10 US US11/746,660 patent/US20070210477A1/en not_active Abandoned

Patent Citations (4)

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