A separator includes a porous substrate, and a porous layer formed on one or both surfaces of the substrate and containing a polyvinylidene fluoride type resin and a filler, in which the filler content in the porous layer is from 30 to 80% by mass with respect to the total mass of the polyvinylidene fluoride type resin and the filler, and the polyvinylidene fluoride type resin is at least one resin selected from the following resin A and B: resin A: a copolymer having a weight average molecular weight of from 100,000 to 350,000, and a content of HFP is more than 5% by mass but not more than 11% by mass; and resin B: a copolymer having a weight average molecular weight of from 100,000 to 1,000,000, in which a content of HFP is more than 11% by mass but not more than 15% by mass.

A waterproofing membrane including a reinforcing material coated with a blend formulation, the blend formulation including glass spheres having a particle size between 0.25-0.50 mm and a particle density between 0.5-0.8 g/cm.sup.3.

A waterproofing membrane including a reinforcing material coated with a blend formulation, the blend formulation including glass spheres having a particle size between 0.25-0.50 mm and a particle density between 0.5-0.8 g/cm.sup.3.

A base material for a printed circuit board includes: an insulating base film; and a sintered body layer of metal particles layered on one side surface of the base film; wherein an arithmetic mean roughness (Sa) of a surface of the sintered body layer that is opposite to the base film is greater than or equal to 0.005 μm and less than or equal to 0.10 μm.

A base material for a printed circuit board includes: an insulating base film; and a sintered body layer of metal particles layered on one side surface of the base film; wherein an arithmetic mean roughness (Sa) of a surface of the sintered body layer that is opposite to the base film is greater than or equal to 0.005 μm and less than or equal to 0.10 μm.

The invention relates to a method for producing a bobbin and a bobbin. The bobbin includes a plurality of windings of a continuous laminated sheet having at least one layer of alkaloids containing material and at least one layer of a first protective material. The at least one layer of alkaloids containing material and the at least one layer of a first protective material define an adhesion surface between them. The first protective material is selected from polypropylene, polyethylene, polytetrafluoroethylene, polyester, or paper.

The invention relates to a method for producing a bobbin and a bobbin. The bobbin includes a plurality of windings of a continuous laminated sheet having at least one layer of alkaloids containing material and at least one layer of a first protective material. The at least one layer of alkaloids containing material and the at least one layer of a first protective material define an adhesion surface between them. The first protective material is selected from polypropylene, polyethylene, polytetrafluoroethylene, polyester, or paper.

A method for forming an antislip material. A flexible thermoplastic carrier is provided. A hot release surface is provided. Provided is a first layer of discrete thermoplastic particles, sifting on the hot release surface. The discrete particles are above their softening temperatures, providing in the first layer a tackiness. The method includes contacting the carrier with the tacky first layer for sticking the first layer to the carrier, and thereafter removing the carrier, and therewith the tacky first layer stuck to the carrier, from the release surface. Thereby the carrier is provided with a hot, preferably discontinuous and/or elastomeric antislip coating. With a heat energy of the hot coating a bond is formed between the carrier and the coating. The removing of the carrier includes pulling the carrier out of the contact with a pulling-out force. The temperature of the hot release surface is above the melting temperature of the carrier. The carrier would be spoiled, if heated completely to the temperature of the release surface and simultaneously pulled with the pulling-out force. Therefore the contacting time is kept shorter than a minimum time required by a heat of the hot release surface for spoiling the carrier. Flat-topped roughening projections can be included in the antislip coating.

A method for forming an antislip material. A flexible thermoplastic carrier is provided. A hot release surface is provided. Provided is a first layer of discrete thermoplastic particles, sifting on the hot release surface. The discrete particles are above their softening temperatures, providing in the first layer a tackiness. The method includes contacting the carrier with the tacky first layer for sticking the first layer to the carrier, and thereafter removing the carrier, and therewith the tacky first layer stuck to the carrier, from the release surface. Thereby the carrier is provided with a hot, preferably discontinuous and/or elastomeric antislip coating. With a heat energy of the hot coating a bond is formed between the carrier and the coating. The removing of the carrier includes pulling the carrier out of the contact with a pulling-out force. The temperature of the hot release surface is above the melting temperature of the carrier. The carrier would be spoiled, if heated completely to the temperature of the release surface and simultaneously pulled with the pulling-out force. Therefore the contacting time is kept shorter than a minimum time required by a heat of the hot release surface for spoiling the carrier. Flat-topped roughening projections can be included in the antislip coating.

A method is provided for manufacturing panels with a substrate and a decorative top layer that may include a printed motif and a transparent or translucent protective layer formed there above. The method may involve applying a first and a second finishing layer for forming a first and a second portion of the protective layer. Recesses may be formed at the surface of the second finishing layer. Hard particles may be provided in the first finishing layer.