摘要:
A composite material has a polymeric upper layer which is connected via at least one adhesive layer to a substrate. The substrate is predominantly or entirely formed by an open-cell polyurethane foam onto which the upper layer, containing between 2 and 12 wt % of polysiloxane, is bonded by an adhesive layer. An intermediate layer or a double layer, i.e. a composite of the intermediate layer with a bonding layer located between the substrate and the intermediate layer, is provided between the upper layer and the substrate as the adhesive layer for joining the upper layer and the substrate. The regions of the substrate into which the polyurethane dispersion of the adhesive layer has penetrated in a controlled manner during application have a density which is between 12% and 48%, above the density of the regions of the substrate without the adhesive layer.
摘要:
A hot melt adhesive composition includes at least a semi-crystalline copolymer of propylene and a polyethylene wax having a Brookfield viscosity of about 20 cP to 500 cP at 140° C., a density of about 0.95 g/cm3 to 0.99 g/cm3 between 23° C. and 25° C., and a Mettler drop point of about 110° C. to 135° C., wherein the composition is characterized by a effective set time of about 0.1 second to 5 seconds. Articles including the composition and methods of making articles including the composition are described.
摘要:
A multilayered carpet cushion underlay structure is provided having a primary sheet of resilient viscoelastic polyurethane foam adhered to a non-woven fabric carrier. The composite material additionally features a subjacent surface having an arrangement of polymeric fictionalizing projections that provide optimal resistance to slippage.
摘要:
Provided is an electromagnetic wave shielding structure, including: a substrate; and a porous composite film formed on the substrate, wherein the porous composite film includes a continuous phase network fused from a plurality of metal nanoparticles, a first resin composition coated on a surface of the continuous phase network and a plurality of holes which are void spaces in the continuous phase network coated with the first resin composition.
摘要:
A process and system for making a laminated surface covering and the surface covering itself are described. The covering includes several layers bonded to each other. The system performs the process. One example of the process includes passing a first material across a first conveyor, passing a second material across a second conveyor, passing a bonding material across a third conveyor, contacting the first material and the second material to the bonding material, and heating at least one of the first material and the second material. The process also includes introducing the first material, the second material, and the bonding material into a pressure zone such that the bonding material is introduced between a bottom surface of the first material and a top surface of the second material. The process applies pressure to bond the first material and second material together via the bonding material to produce a laminated material.
摘要:
Hot-melt adhesive compositions are described that have at least one thermoplastic poly-α-olefin that is solid at 25° C. and silane groups, at least one thermoplastic poly-α-olefin that is solid at 25° C. and that does not contain silane groups, and at least one resin that is tackifying at 25° C. The product of the content of the thermoplastic poly-α-olefin with respect to the weight and the degree of grafting of the thermoplastic poly-α-olefin is ≦0.06. In comparison to conventional hot-melt adhesive compositions based on poly-α-olefins, the described hot-melt adhesive compositions are characterized in that the hot-melt adhesive compositions can be reactivated after the processing and cross-linking. That is, the compositions can be put into a liquid or soft state by means of heat and pressure and can be processed well again. At the same time, the described hot-melt adhesives have the physical processing properties characteristic of reactive polyolefin hot-melt adhesives, such as high initial heat resistance, high final strength and heat stability, and good resistance to environmental influences.
摘要:
A tough water-permeable paver block includes a mass of adherent coated granules with intervening contiguous channels. A method for making pavers includes selecting a gravel, heating, then evenly coating every granule with a non-rigid thermoplastics material typically at about 75 g/kg gravel, placing the hot material into a form, then cooling, optionally under imposed pressure. In one option the paver is formed from loose granules at its final resting place. The material may be provided as a coated, non-adherent gravel for heating into a coherent mass in situ. Applications include footpaths, roads and drain covers.
摘要:
Prepregs, cores and composite articles are described that comprise lighter weight materials and/or lower amounts of adhesive than commonly used. In some instances, one or more components of the articles may comprise a repellent material or repellent treatment to reduce the overall absorption rate of adhesive into the components of the article.
摘要:
The invention relates to the use of a multilayered, opaque, biaxially oriented polyolefin film of a vacuole-containing base layer and at least one inner cover layer comprising at least 30-95% by weight of a copolymer and/or terpolymer I having a seal initiation temperature I of 70-105° C. and 5 to 70% by weight of an incompatible polyethylene, each of the specifications in percent by weight being based on the weight of the inner cover layer and the inner cover layer having a seal initiation temperature II of 80 to 110° C.
摘要:
The present invention relates to a composition comprising: a) one or more prepolymers comprising the reaction product of a polyisocyanate having functionality of greater than 2 to about 2.9 and one or more polypropylene diols ethylene oxide capped polypropylene diols having a number average molecular weight of about 400 to 4,000; b) one or more polyisocyanates having a functionality of greater than 2 to about 2.9; c) one or more acids; d) one or more catalysts comprising dimethyl tin dicarboxylates, and e) one or more aromatic carbonyl chlorides. The composition can be used to bond laminates together useful in automobiles as for instance as headliners, in sunroofs and as rear shelves.