摘要:
A paperboard core suitable for use in winding yarns may include strips of paperboard wrapped about an axis and secured together to form an elongate structure defining a winding surface. A coating of a polymer such as polyvinylidene chloride covers the winding surface. The coating may be applied to the strips of paperboard prior to winding and/or applied to the winding surface after winding. The coating may comprise multiple layers of the polymer, which may be cured individually. The coating may also be applied so as to create a substantially uninterrupted coating along the winding surface. One method of applying the coating is by roll-coating.
摘要:
A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.
摘要:
A device for continuously wrapping a strip of reinforcement to a tube, the device including two spaced-apart assemblies of cylindrical rollers where the cylindrical surfaces of the rollers of each assembly are respectively arranged to substantially contact first and second imaginary planes.
摘要:
A hose having a continuously wrapped reinforcement applied to a tube at a small helical angle by passing the tube and a strip of reinforcement between two sets of rollers where the axes of the first set are offset at an angle from the axes of the second set of rollers.
摘要:
The present invention relates to a method for manufacturing of a stiffening element (1, 1′, 1″, 2) of composite material, which stiffening element is provided for attachment to a curved shell surface (9), said stiffening element (1, 1′, 1″, 2) comprises a web (3) and at least one flange (5), the outer surface (11) of which has a radius (R) of curvature corresponding with the curvature of said curved shell surface (9) The method comprises the following steps of: providing a substantial flat blank (19) of composite material; and folding said blank (19) along a first folding line (13), the curvature of which is defined by an imaginary three-dimensional intersection line (115) being derived from the radius (R) of curvature of the curved shell surface (9).
摘要:
A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.
摘要:
A machine for winding conical bodies of receptacles in a helical manner around a conical, rotating shaping member using webs of waste paper is disclosed.