Provided is a developing roll (R) with which it is possible to suppress toner stress in a low-temperature and low-humidity environment. A developing roll (R) for an electrophotographic device has a surface layer (1). In a surface hardness histogram (10) of the surface layer (1) measured by using an atomic force microscope (AFM), the surface hardness (H) at the top peak (P) is in the range of 10-55 MPa, and the area ratio (S) of the histogram portion corresponding to a surface hardness of 45 MPa or below in relation to the entire histogram is 65% or above.

Provided is a developing roll (R) with which it is possible to suppress toner stress in a low-temperature and low-humidity environment. A developing roll (R) for an electrophotographic device has a surface layer (1). In a surface hardness histogram (10) of the surface layer (1) measured by using an atomic force microscope (AFM), the surface hardness (H) at the top peak (P) is in the range of 10-55 MPa, and the area ratio (S) of the histogram portion corresponding to a surface hardness of 45 MPa or below in relation to the entire histogram is 65% or above.

Provided is a developing roll (R) with which it is possible to suppress toner stress in a low-temperature and low-humidity environment. A developing roll (R) for an electrophotographic device has a surface layer (1). In a surface hardness histogram (10) of the surface layer (1) measured by using an atomic force microscope (AFM), the surface hardness (H) at the top peak (P) is in the range of 10-55 MPa, and the area ratio (S) of the histogram portion corresponding to a surface hardness of 45 MPa or below in relation to the entire histogram is 65% or above.

Binder compositions that are formaldehyde free and include a latex emulsion, an epoxysilane, an epoxy dispersion, a polyol or a latex emulsion, a styrenic copolymer having carboxylic acid functionality, an epoxysilane or an epoxy dispersion or a mixture of both, a polyol and, optionally, an additive, wherein the composition does not comprise formaldehyde are described.

Binder compositions that are formaldehyde free and include a latex emulsion, an epoxysilane, an epoxy dispersion, a polyol or a latex emulsion, a styrenic copolymer having carboxylic acid functionality, an epoxysilane or an epoxy dispersion or a mixture of both, a polyol and, optionally, an additive, wherein the composition does not comprise formaldehyde are described.

Disclosed is a dipping composite material for enhancing the cut resistance of chemical-resistant gloves, wherein an additive is added to a latex, and the additive is a metal oxide and/or silica and/or glass fiber and/or basalt fiber and/or aramid fiber. The present invention improves the formula of a dipping layer such that the dipping layer has the cut resistance, which can significantly improve the cut resistant level of gloves.

Disclosed is a dipping composite material for enhancing the cut resistance of chemical-resistant gloves, wherein an additive is added to a latex, and the additive is a metal oxide and/or silica and/or glass fiber and/or basalt fiber and/or aramid fiber. The present invention improves the formula of a dipping layer such that the dipping layer has the cut resistance, which can significantly improve the cut resistant level of gloves.

Described herein is a latex blend comprising (i) an amorphous perfluoropolymer and (ii) an aqueous dispersion of semi crystalline fluoropolymer particles, wherein the particles comprise a TFE homopolymer or a TFE copolymer comprising no more than 1 wt % of a second fluorinated monomer, wherein the semi crystalline fluoropolymer particles (a) have an MFI (372? C. with 2.16 kg) of less than 50 g/10 min or (b) are not melt processible and have an SSG of less than 2.190, wherein the semi crystalline fluoropolymer particles have an average diameter greater than 100 nm.

Described herein is a latex blend comprising (i) an amorphous perfluoropolymer and (ii) an aqueous dispersion of semi crystalline fluoropolymer particles, wherein the particles comprise a TFE homopolymer or a TFE copolymer comprising no more than 1 wt % of a second fluorinated monomer, wherein the semi crystalline fluoropolymer particles (a) have an MFI (372? C. with 2.16 kg) of less than 50 g/10 min or (b) are not melt processible and have an SSG of less than 2.190, wherein the semi crystalline fluoropolymer particles have an average diameter greater than 100 nm.

The invention discloses an environmentally friendly impregnation system for fiber surface treatment and a preparation method thereof, and an impregnation treatment method. The environmentally friendly impregnation system for fiber surface treatment of the invention includes hydroxyacrylic resin, amino resin, epoxy resin, blocked isocyanate, accelerator, rubber latex, and deionized water. Depending on the type of fiber and its application, the invention allows for the selection of one-step impregnation treatment or two-step impregnation treatment. The invention can effectively replace the use of toxic raw materials and intermediates in traditional RFL impregnation system, reducing harm to human health and the environment while achieving the adhesion level of RFL treatment.