Flexible film and sheet

Flexible film and sheet in a wide range of thicknesses can be welded in this way, at relatively high speeds. 

Verilon, PVC flexible film and sheet. Continental Plastic Co., Div. CPI, Inc. 

LLDPE, molding and extrusion compounds LDPE, LLDPE, MDPE, ethylene copolymer raw materials, flexible films and sheeting, webs and cuttings PP PP PP... 

PP flexible films and sheeting, webs and cuttings PP with carbon fibers... 

Protective Lining Corp. Protectolite LDPE flexible films and sheetings. 

Demertzis and co-workers [48] carried out an in-depth study of the influence of gamma irradiation on the formation of solvent extractable radiolysis prodncts of flexible films and sheeting for food packaging. The packaging, which was made from PE, PP, polyethylene terephthalate (PET), PS, polyvinylchloride (PVC) and polyamide (PA), was subjected to Co irradiation at a dose of 44.0 kGy. Separation and identification of extracted compormds were carried out using GC-MS and compositional changes in the radiolysis prodncts quantified by calibration using MS detector response. 

S.4.2 Extruded Flexible Film and Sheet The resin viscosities used in extruded film and sheet are dependent on the application, but normally iT-values range from 60 to 71, with 66 being an average viscosity. Although resin gel content is critical in many extruded and calendered flexible film and sheet applications, extruded products are less tolerant to gels as a rule than calendered products. Since one can achieve sheet products of greater thickness with the extrusion process, differences in clarity between resins can become more important. 

Calendered Flexible Film and Sheet Many of the requirements listed above in Section 2.6A.2 apply to calendered film and sheet as well. There are a few differences, which are highlighted below. 

Simple primary amides such as stearamide, oleamide, and erucamide are widely used in polyolehns and styrenics as lubricants, but mainly in vinyl as release agents, discussed in the following. Aliphatic amides are strong enough nucleophiles (at process temperatures) to detract from the heat stability of PVC, and are therefore used at low levels or in situations where heat aging is not critical. When the latter is the case, the above amides are excellent multifunctional lubricants in flexible film and sheet. Stearamide is used mainly in filled applications, oleamide in clear or translucent sheet. Although it is feasible to formulate stabilizer systems that overcome effects on heat stability, there has been a trend towards replacement with ester lubricants. 

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