There is provided a paper for packaging of medical devices comprising 5-25 wt. % (dry) synthetic fibres comprising polyester and 2.0-12.0 wt. % (dry) of a latex binder or 1.0-5.0 wt. % (dry) of a starch binder, wherein the length of the synthetic fibres is 8-14 mm and the thickness of the synthetic fibres is 5.5-9.0 dtex and wherein the paper has a grammage according to ISO 536:2012 of 70-110 g/m.sup.2.

There is provided a paper for packaging of medical devices comprising 5-25 wt. % (dry) synthetic fibres comprising polyester and 2.0-12.0 wt. % (dry) of a latex binder or 1.0-5.0 wt. % (dry) of a starch binder, wherein the length of the synthetic fibres is 8-14 mm and the thickness of the synthetic fibres is 5.5-9.0 dtex and wherein the paper has a grammage according to ISO 536:2012 of 70-110 g/m.sup.2.

A method may produce a heat-resistant resin composite excellent in heat resistance and bending properties. This heat-resistant resin composite is constituted of a matrix resin and reinforcing fibers dispersed in the matrix resin. The matrix resin is constituted of a heat-resistant thermoplastic polymer having a glass transition temperature of 100° C. or higher, and a polyester-based polymer comprising a terephthalic acid unit (A) and an isophthalic acid unit (B) at a copolymerization proportion (molar ratio) of (A)/(B)=100/0 to 40/60. The proportion of the heat-resistant thermoplastic polymer in the composite is 30 to 80 wt %.

A method may produce a heat-resistant resin composite excellent in heat resistance and bending properties. This heat-resistant resin composite is constituted of a matrix resin and reinforcing fibers dispersed in the matrix resin. The matrix resin is constituted of a heat-resistant thermoplastic polymer having a glass transition temperature of 100° C. or higher, and a polyester-based polymer comprising a terephthalic acid unit (A) and an isophthalic acid unit (B) at a copolymerization proportion (molar ratio) of (A)/(B)=100/0 to 40/60. The proportion of the heat-resistant thermoplastic polymer in the composite is 30 to 80 wt %.

The present invention relates to a porous sheet comprising cellulose fibers having an average fiber diameter ranging from 20 to 500 nm; cut fibers having an average fiber diameter ranging from 1.5 to 20 μm; and a hydrophilic polymer binder, wherein an amount of the cut fibers is 1% by weight or more and 80% by weight or less based on the total weight of the cellulose fibers and the cut fibers, and an amount of the hydrophilic polymer binder is 5 parts by weight or more and 30 parts by weight or less with respect to 100 parts by weight of the total weight of the cellulose fibers and the cut fibers. The porous sheet of the present invention can exhibit a superior strength (in particular, both tear strength and tensile strength), and exhibits a superior performance as a separator for an electrochemical device.

The present invention relates to a porous sheet comprising cellulose fibers having an average fiber diameter ranging from 20 to 500 nm; cut fibers having an average fiber diameter ranging from 1.5 to 20 μm; and a hydrophilic polymer binder, wherein an amount of the cut fibers is 1% by weight or more and 80% by weight or less based on the total weight of the cellulose fibers and the cut fibers, and an amount of the hydrophilic polymer binder is 5 parts by weight or more and 30 parts by weight or less with respect to 100 parts by weight of the total weight of the cellulose fibers and the cut fibers. The porous sheet of the present invention can exhibit a superior strength (in particular, both tear strength and tensile strength), and exhibits a superior performance as a separator for an electrochemical device.

A heat insulating material composition, including: a composite in which cellulose microfibrils enclose wet silica particles having an average particle diameter of 1 μm or more and 50 μm or less.

A heat insulating material composition, including: a composite in which cellulose microfibrils enclose wet silica particles having an average particle diameter of 1 μm or more and 50 μm or less.

The invention provides polyester binder fibers comprising: a component comprising polyester and a melting point-reducing additive, wherein at least 80 wt % of the polyester is recycled polyester.

Fibrous structures that exhibit a novel combination of properties and to methods for making such fibrous structures are provided.