A scrubber and methods of forming a scrubber. The scrubber may include a foamed melamine resin, a first foamed polyurethane resin, a second foamed polyurethane resin, and a binder. The scrubber can be configured to exhibit the properties of both a scrubber and an eraser, and have a density ranging from 0.01 to 0.5 grams per cm.sup.3. A method of forming the scrubber may include the following steps: mixing foamed melamine resin particles, first foamed polyurethane resin particles, and second foamed polyurethane resin particles to form a first mixture; and mixing the first mixture with a binder to form a second mixture.

The invention discloses a method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps, cutting and processing the scraps generated in the process of polyimide foam production into particles of different sizes, drying red iron oxide or black iron oxide or titanium dioxide as inorganic additive, and then using each component in parts by weight, putting the inorganic additive into the mixer, and then putting the polyimide foam particles of different sizes into the mixer to mix, injecting the curing agent into the mixer to continue mixing, and finally adding the catalyst into the mixer to continue mixing, putting the mixed material into the mold evenly to form the film, leaving it for 10 hours, opening the mold, taking out the product, removing the burrs, and cutting the product according to customer needs, and packing it in a carton for storage.

A bio-resin composition, a bio-resin composite, and a bio-foam material are provided. The bio-resin composition includes a polymer matrix, a toughener, and an antistatic agent. The weight ratio of the polymer matrix to the toughener is between 90:10 and 60:40. Based on the total weight of the polymer matrix and the toughener, the content of the antistatic agent is between 1% and 10%.

Flame retardant compositions, blends and articles include phosphonate polymers, nanoparticles and optionally dispersing agents. A method for preparing such retardant composition, blends, and articles is also presented herein.

The present invention relates to a polymeric composition comprising an impact modifier, a processing aid and a mineral filler and its process of preparation and its use. In particular the present invention relates to a polymeric composition comprising an impact modifier, a processing aid and a mineral filler and its use for thermoplastic polymers. More particularly the present invention relates to the process of preparation of polymeric composition comprising an impact modifier, a processing aid and a mineral filler and its use for the transformation and/or processing of thermoplastic polymers.

A composition suitable for making uncrosslinked polyethylene foam and an uncrosslinked polyethylene foam comprising: 50-95 wt. % of a low density polyethylene having a density ranging from 0.915 to 0.930 g/cc and melt index of 1-4 g/10 min; and 5-50 wt. % of an ethylene/alpha-olefin interpolymer having: a density ranging from 0.910-0.930 g/cc; a melt index ranging from 0.5 to 6.0 g/10 min; a Mw/Mn of from 2.8 to 4.5; and a ZSVR of 1.8 to 10.0.

A foam composition comprises a recycled polyvinyl butyral in an amount from 5 wt % to 70 wt %; an ethylene-ester copolymer in an amount from 10 wt % to 70 wt %; a foaming agent in an amount from 0.5 wt % to 3.5 wt %; a peroxide crosslinking agent in an amount from 0.5 wt % to 3.0 wt %; and a hydrazide crosslinking agent in an amount from 0.1 wt % to 2.5 wt %, based on a total weight of the foam composition. A foam produced from the foam composition can avoid emitting an unpleasant odor of aldehydes, and the foam also has good mechanical properties and good resilience.

The present disclosure herein discloses a preparation method of a polyurethane-based nano-silver SERS substrate, belongs to the technical field of Raman spectrums, and aims to solve problems of complex preparation process, low sensitivity and the like of SERS substrates. The method uses solidified polyurethane as a skeleton, and the polyurethane adsorbs nano silver particles onto its surface due to a porous surface structure and adsorptivity, so an SERS substrate with crystal violet as a probe molecule and having a limit of detection as low as 10.sup.−10 M is obtained. The SERS substrate prepared by the method has a large surface area, adsorbs a large number of target molecules, and is easy to prepare, high in sensitivity, and conducive to qualitative and quantitative analysis of SERS.

This invention describes a type of all-organic piezoelectric material based on cellulose nanocrystals (CNCs). This type of material is flexible and transparent, and its properties can be tuned by adjusting the composition and ionic strength. The fabrication of this type of piezoelectric material can be carried out entirely in an aqueous medium and does not require high temperature poling and stretching treatment. It renders possible a commercially viable route to producing inexpensive, sustainable, eco-friendly high piezo-electric-response organic materials for sensors, transducers, actuators, and energy harvest applications.

A porous sound absorbing material having an average cell size of 100 to 600 μm and an apparent density of 40 to 140 kg/m.sup.3. A sound absorption method using this porous sound absorbing material.