Punched pocket

A clear plastic cover is usually made of plastic film ( " Transparency " ) produced, two - or three-sided closed pocket to protect documents. Common forms are two-sided closed shells without binding and closed on three sides with margin for use in file folders. The latter is mainly a prospectus shell that non-perforated version briefcase or preserver known as.

Sheet protectors are available with different perforations ( such as 4- hole or 11- hole ) provided, so that they can be stored not only in folders and loose-leaf binder with two filing pins or Aufreihbändern, but including in the prospectus albums with multi-ring tuners. In addition, there are books for different view rich content, in which sheet protectors are firmly welded to the back.

They are made of transparent, clear or colored sheets of PVC or PP. PP sleeves are permanent ink, toner contained copies or prints are not affected by plasticizer in the material. The materials used are grained (mostly for PP sleeves ) or smooth, the latter slightly milky or clear. The standard film thicknesses are in the range of 40 microns (low stress resistance ) to 200 microns ( high requirements).

Clear Pockets are (A4 especially rare A2, A3 and A5) for common DIN-/ISO 216 paper sizes but also available in special sizes ( for small format negatives, photos, business cards or CDs). Perforations are based on the ISO 838 standard ( and its known as " 888" vierlöchrige extension).

Also for use outside the home sheet protectors are made, which serve as protection against the weather (rain, humidity) and dirt. Such casings are used as for maps, but also for mobile data acquisition and communication devices.

• Office supplies
• Plastic container