A method for producing a wet rubber masterbatch uses a single-screw extruder. The single-screw extruder includes a screw, and an external cylinder in which a slit extended along the length direction of the external cylinder (the screw-shaft direction) is formed in an internal wall surface of the external cylinder, and when the width of the slit is represented by A and the clearance between a crest of the screw and the internal wall surface of the external cylinder is represented by B, the following expression (1) is satisfied:

0<AB(Y)/AB(X)<0.9(1)

wherein AB (Y) is the product of A and B at a downstream side along the screw-shaft direction of the external cylinder, and AB (X) is the product of A and B at an upstream side along the screw-shaft direction of the external cylinder.

A dental floss threader adapted to minimize discomfort of the user comprising: a shank extending between a first end and second and being elastically deformable; an eyelet integrally joined at said first end of said shank; and a covering enclosing said second end of said shank.

The invention relates to an expander (100) for training the muscles, especially the fast-acting muscle fibers, having an elastic element (110) that can be expanded against its restoring force for the purpose of training, as well as to a method for manufacturing such an expander.

According to the invention, the elastic element (110) consists of a composite of at least two different elastic materials (120, 130), with a first elastic material (120) being instantiated as a closed line pattern with an offset or non-offset four-fold or with a six-fold unit cell (E), with the closed line pattern being instantiated as boundary lines (121) of the tiles (122) of a tiling pattern, and with another elastic material (130) filling out the surfaces of the tiles (121).

The structure of the elastic element results in stress-strain diagrams with different gradients in different extension sections that are flatter in the working range and can therefore be used advantageously for training explosive strength and speed.

The present disclosure provides acoustically-responsive scaffold (ARS) precursor formulations comprising fibrinogen, alginate, hyaluronic acid, or a combination thereof, acoustically-responsive scaffolds comprising spatially patterned phase-shift emulsions (PSEs), and methods of using thereof (e.g., as implants, for tissue repair or regeneration and/or delivery of therapeutic agents).

This invention relates to an elastomeric article with improved lubricity and donnablity and reduced stickiness/tackiness. According to the methods of the invention, the internal surface of the elastomeric article is coated with a polyisoprene coating. The coating of the invention is formed from synthetic polyisoprene rubber that may or may not contain minor amounts of other components. The coating is preferably directly bonded to the underlying elastomeric article.

A water-based hydrogel polymer coating and a method of application to natural rubber or other elastomeric latex products are provided. The water-based hydrogel polymer is mixed with a blend of at least one elastomeric material to provide a hydrogel polymer blend composition. The water-based hydrogel polymer blend composition is applied in a single application to an elastomeric article, such as gloves, without additional solvents in the polymer blend composition and without a separate acid or chemical priming step. The water-based hydrogel coating herein provides increased lubricity to facilitate improved wet and dry donning of the elastomeric article.

Disclosed is an emulsion formed using, as an emulsifier, 0.01 to 30 parts by weight of a perfluoroalkylethyl phosphonic acid salt represented by the general formula: C.sub.nF.sub.2n+1CH.sub.2CH.sub.2P(O)(OM.sup.1)(OM.sup.2) [III] (M.sup.1: a hydrogen atom, ammonium salt, or organic amine salt, M.sup.2: an ammonium salt or organic amine salt, n: 1 to 6), based on 100 parts by weight of a perfluoropolyether oil represented by the general formula: RfO(C.sub.3F.sub.6O).sub.p(C.sub.2F.sub.4O).sub.q(CF.sub.2O).sub.rRf [I] (Rf and Rf: C.sub.1-C.sub.5 perfluoroalkyl groups, p+q+r: 2 to 200) or the general formula: F(CF.sub.2CF.sub.2CF.sub.2O).sub.nCF.sub.2CF.sub.3 [II] (n: 2 to 100), or a perfluorocarbon compound. In spite of using, as an emulsifier, a compound having a perfluoroalkyl group containing 6 or less carbon atoms, which is said to have low bioaccumulation potential, the emulsion exhibits excellent emulsification stability, and therefore can be effectively used as a surface-treating agent, such as a mold-releasing agent.

A dip-molding composition of the present invention contains a latex (A) of a nitrile-group-containing highly saturated copolymer rubber (a). The nitrile-group-containing highly saturated copolymer rubber (a) contains an ,-ethylenically unsaturated nitrile monomer unit and a conjugated diene monomer unit, and being obtained by hydrogenating at least part of the conjugated diene monomer unit. A dip-molded article of the present invention is produced by dip molding of the above dip-molding composition

The present disclosure provides for a process for manufacturing of dipped latex products without using any animal derived ingredients and dipped latex products produced by said process. The disclosed process successfully over comes drawbacks of drop in product yield (due to coagulum formation) and burst pressures caused by absence-of casein in latex formulation. Therefore, the dipped latex products so produced through the process have final composition similar to that of any other dipped latex products with casein except for absence of casein and having 0.8 phr of Sulphur as against 0.6 phr of Sulphur in routine manufacturing. The products also exhibit physical properties similar to that of any other dipped latex products with casein, such as burst pressure and burst volume.

An elastomeric article is formed from a blend of nitrile rubber and polychloroprene rubber. The elastomeric article can be a glove, such as a medical exam glove. The elastomeric article is softer than a conventional nitrile elastomeric article. The elastomeric article is formed from a blended rubber latex emulsion of nitrile and polychloroprene. The blended rubber latex emulsion may be free of sulfur and vulcanization accelerators.