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Tear-ply

One surface preparation method that is unique for composites employs a peel or tear ply.77 Utilization of the peel ply is illustrated in Fig. 16.5. With this technique, a closely woven nylon or polyester cloth is incorporated as the outer layer of the composite during its production layup. This outer ply is then torn or peeled away just before bonding. The tearing or peeling process fractures the resin matrix coating and exposes a clean, fresh, roughened surface for the adhesive. This method is fast and eliminates the need for solvent cleaning and mechanical abrasion. [Pg.380]

FIGURE 16.5 Structural reinforced composite with tear ply to produce fresh bonding... [Pg.381]

Sachets can be fabricated from a single web with a centre fold, using a three or four sided seal or two webs using a four sided seal. The reels may be fed horizontally or vertically and be sealed by a series of heated platens or rollers (cylinders) or a combination of the two. In certain ways they are an enlarged version of a strip pack. The sachet seal can also be made peelable by a non-seal part on the web which may involve a pattern lacquer rather than a full heat seal coating. Difficult to tear plies, like PET, can also be used provided a cut or V-notch is added to initiate the tear. [Pg.378]

Laminates can be prepared by either abrasion or the tear-ply technique. In the tear-ply design, the laminate is manufactured so that one ply of heavy fabric, such as Dacron, glass, or the equivalent, is attached at the bonding surface. Just prior to bonding, the tear-ply is stripped away, and a fresh, clean, hondable surface is exposed. [Pg.442]

Tear plies are usually constructed out of densely woven glass fabric. It is placed on the top or bottom of a laminate construction before molding. The tear ply is removed inunediately before bonding. Tear plies are commonly used when manufacturing and bonding composites in the aerospace industry. [Pg.547]

Figure T.3 Structural reinforced plastic laminate with a tear ply to produce fresh bonding surface. (Ref Snogren, R.C., Handbook of Surface Preparation, Pahnerton Publishing, New York, 1974)... Figure T.3 Structural reinforced plastic laminate with a tear ply to produce fresh bonding surface. (Ref Snogren, R.C., Handbook of Surface Preparation, Pahnerton Publishing, New York, 1974)...
If water-break-free surfaces cannot be obtained by tear-ply, sandblasting, or manual scouring, the plastic laminates should be treated as follows ... [Pg.124]


See other pages where Tear-ply is mentioned: [Pg.381]    [Pg.7]    [Pg.130]    [Pg.131]    [Pg.222]    [Pg.306]    [Pg.525]    [Pg.104]    [Pg.396]    [Pg.547]    [Pg.431]    [Pg.208]    [Pg.209]    [Pg.123]    [Pg.123]    [Pg.123]   
See also in sourсe #XX -- [ Pg.380 , Pg.381 ]

See also in sourсe #XX -- [ Pg.396 , Pg.547 ]




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