An embedded protrusion integrated condom, a manufacturing process, and a piece of special production equipment are disclosed. The condom includes a condom body and a function adjusting component configured to adjust the usage effect. The manufacturing process includes a condom body forming step, a function part paste step, a function part embedding step, and an embedded condom body structure reinforcement step. The special production equipment includes a multi-station synchronous impregnation mold, at least one series of combined impregnation pool, a control system, an automatic latex brush mechanism matching the combined impregnation pool, an automatic paste mechanism, and an automatic blanking mechanism. The condom has the usage effects such as good body touch effect and being able to realize physical delay; the manufacturing process and the special production equipment has the technical advantages of high automation degree, high production efficiency, and the like.

The present disclosure provides a mold for molding a polyurethane condom, and methods for manufacturing and using the mold. The mold (200) has a surface roughness of 0.2 or less, is formed from a thermoplastic polymer having a surface tension of 10-35 mN/m. The mold (200) for molding a polyurethane condom is prepared by injection molding the thermoplastic polymer. When the mold (200) is used, the mold (200) is hung vertically and dipped in an emulsion containing a polyurethane resin to obtain a dipped mold (200), then the dipped mold (200) is removed and dried to form a polyurethane film on its surface, and then demolded to obtain a polyurethane condom (100). The condom formed by the mold (200) is thin and has excellent flexibility and strength, satisfying the market demand for the product.

A composite material comprising an elastomer and nanocellulose. The nanocellulose may comprise a nanocellulose material derived from plants having C4 leaf anatomy, or a nanocellulose material derived from a plant material having a lesser amount of lignin than hemi-cellulose, or a nanocellulose having a hemicellulose content of from 25% to 55% by weight of the nanocellulose material, or a nanocellulose comprising nanofibrils having a diameter of up to 5 nm, or a nanocellulose comprising nanocellulose material of plant origin comprising nanocellulose particles or fibres having an aspect ratio of at least 250, or the composite material having a stiffness of not greater than 2.5 times the stiffness of the elastomer without the nanocellulose material being present, or the nanocellulose particles or fibres being derived from a plant material having a hemicellulose content of 30% or higher (w/w). The nanocellulose may be derived from arid Spinifex.

Dipped formed latex articles with improved properties are formed from branched block copolymers, derived from alkenyl aromatic hydrocarbon—1,3-diene monomer system, and branched polyisoprene homopolymers, derived from isoprene. The polymers are obtained by polymerization in the presence of an anionic initiator; at a temperature from 0° C. to 100° C.; followed by coupling with a multifunctional coupling agent of formula (R.sup.1O).sub.3Si—Y—Si(OR.sup.2).sub.3, wherein R.sub.1 and R.sub.2 are independently C.sub.1-C.sub.6 alkyl groups; and Y is a C.sub.2-C.sub.8 alkylene group. The polymers are obtained as rubber cements having high solids content and low zero shear viscosities. The rubber cements are valuable for making latices and latex articles such as dipped goods, e.g., condoms, gloves, etc., with improved properties.

The technology relates to a method of producing a moulded polyurethane hydrogel, for example a condom. The method involves forming a solution of at least one polyurethane having a molecular weight of between about 40000 to about 500000 in a water:organic polar solvent comprising less than about 40% (v/v) water; applying a layer of the solution to a mould; drying the layer of the first solution to form a polyurethane film on the mould; and contacting the polyurethane film with a swelling agent under conditions such that the film forms a polyurethane hydrogel with a swelling agent content of between about 1% to about 95%.

A synthetic polyisoprene latex emulsion has pre-vulcanization composition and post vulcanization composition. The pre-vulcanization composition comprises insoluble amorphous sulfur extracted with zinc dithiocarbamate catalyst at 20° C. to form sulfur chain and transported to interior of synthetic polyisoprene particle forming physical attachment of sulfur to active sites. The degree of pre-vulcanization is verified by expansion of cast and dried film of latex in toluene in 20 minutes by means of a swelling index test. The latex emulsion is vulcanized at 90° C. to 120° C. for 3 to 5 minutes. Post-vulcanization composition with accelerators crosslink between synthetic polyisoprene particles, uniformly curing both in the inter-particle and intra-particle regions to produce high cross link density, uniform distribution of double bonds with zinc segregation at the boundaries of original particles. The condom exhibits high tensile strength, tensile modulus, elongation with excellent tear strength releasing below 10 ppb of nitrosamines.

Disclosed are a polyurethane condom (100) with an adhesive layer (20) and a preparation method therefor. The polyurethane condom (100) with the adhesive layer (20) comprises a first polyurethane film layer (10), the adhesive layer (20) on the first polyurethane film layer (10), and a second film layer (30) on the adhesive layer (20), wherein the adhesive layer (20) includes 0 to 100% by weight of a polar component, 0 to 100% by weight of a non-polar component, and 0 to 100% by weight of a material composed of a polar and non-polar hybrid component, and has a thickness of 0.1 to 30 μm.

The present disclosure relates to synthetic polyisoprene elastomeric articles including: one or more cured blend compositions of pre-vulcanized synthetic polyisoprene particles and non-prevulcanized synthetic polyisoprene particles, wherein the pre-vulcanized synthetic polyisoprene particles and the non-prevulcanized synthetic polyisoprene particles are bonded by mono-sulfidic and/or di-sulfidic, and poly-sulfidic crosslinks, wherein the poly-sulfidic crosslinks are present in an amount of 60 to 79 percent of the total amount of crosslinks in the cured blend composition. Methods of making synthetic polyisoprene elastomeric articles such as gloves or condoms is also disclosed.

Polymeric articles, such as condoms or gloves, including a decoration, are described. The polymeric article includes at least two polymeric layers, and a decoration. The decoration is at least one of a polymeric film, a decal or a temporary tattoo disposed between the at least two polymeric layers. Methods for manufacturing polymeric articles including a decoration are also described.

Disclosed in the present disclosure are a pure polyurethane condom having an adhesive layer, and a method for preparing the condom. The pure polyurethane condom having an adhesive layer at least comprises: a first polyurethane film layer; a polyurethane adhesive layer on the first polyurethane film layer; and a second polyurethane film layer on the polyurethane adhesive layer, wherein the 100% tensile modulus of the polyurethane adhesive layer is 2.5 N/mm.sup.2 or lower, and the structures of the first polyurethane film layer and the second polyurethane film layer are different from that of the polyurethane adhesive layer.