A method for preparing a pulp molded cup lid with buckles without overlapping curves on both surfaces, comprising: diluting plant fiber into pulp and placing it into a forming mold with a filter screen to form a paper embryo through vacuum adsorption; assembling the forming mold with a transfer mold under no pressure for vacuumization to obtain a paper embryo; transferring the paper embryo into a heat setting mold without mesh screen and assembling the mold under no pressure to obtain a cup lid body with stiffening ribs; then stamping into a finished cup lid. The cup lid has smooth internal and external surfaces without overlapping curves and no paper fiber dissolved out at the places where the internal surface and the liquid contact and the suction port and the labial part of the user contact; buckles improves the strength of the cup lid and the leakproofness.

A method for preparing a pulp molded cup lid with buckles without overlapping curves on both surfaces, comprising: diluting plant fiber into pulp and placing it into a forming mold with a filter screen to form a paper embryo through vacuum adsorption; assembling the forming mold with a transfer mold under no pressure for vacuumization to obtain a paper embryo; transferring the paper embryo into a heat setting mold without mesh screen and assembling the mold under no pressure to obtain a cup lid body with stiffening ribs; then stamping into a finished cup lid. The cup lid has smooth internal and external surfaces without overlapping curves and no paper fiber dissolved out at the places where the internal surface and the liquid contact and the suction port and the labial part of the user contact; buckles improves the strength of the cup lid and the leakproofness.

A method of forming a molded article includes preparing a fiber suspension by liquidizing fibrous material in a suspending liquid using at least one high shear mixer. The fiber suspension is fed to the molding surface of a porous mold. The suspending liquid is removed via the pores of the porous mold to deposit suspended fibers on the mold surface as a molded article. Removing the suspending liquid is achieved by pressing a bladder formed of a flexible impermeable membrane against the article using pressure applied behind the membrane. The molded article is removed from the porous mold dried using microwave radiation generated using at least one magnetron. A molding apparatus is use in the method and a molded article is produced by the method.

A method of forming a molded article includes preparing a fiber suspension by liquidizing fibrous material in a suspending liquid using at least one high shear mixer. The fiber suspension is fed to the molding surface of a porous mold. The suspending liquid is removed via the pores of the porous mold to deposit suspended fibers on the mold surface as a molded article. Removing the suspending liquid is achieved by pressing a bladder formed of a flexible impermeable membrane against the article using pressure applied behind the membrane. The molded article is removed from the porous mold dried using microwave radiation generated using at least one magnetron. A molding apparatus is use in the method and a molded article is produced by the method.

The present disclosure describes methods of treating fibrous cellulosic materials with sucrose fatty acid ester containing particles (carrier systems) that allow for modifications of surfaces, including making such surfaces water resistance and/or oil/grease resistance. The methods as disclosed provide combining at least one saccharide fatty acid esters (SFAE) with a polymer (e.g., latexes) to form micellular particles and applying such particles to substrates including fibrous cellulose-based materials (e.g., pulp) to form, inter alia, molded products. Compositions comprising combinations of SFAE, a latex and optionally a mineral or other additives are also disclosed.

The present disclosure describes methods of treating fibrous cellulosic materials with sucrose fatty acid ester containing particles (carrier systems) that allow for modifications of surfaces, including making such surfaces water resistance and/or oil/grease resistance. The methods as disclosed provide combining at least one saccharide fatty acid esters (SFAE) with a polymer (e.g., latexes) to form micellular particles and applying such particles to substrates including fibrous cellulose-based materials (e.g., pulp) to form, inter alia, molded products. Compositions comprising combinations of SFAE, a latex and optionally a mineral or other additives are also disclosed.

The invention discloses a method for producing a three dimensional molded product from cellulose fibers, comprising the steps of: providing a cellulose fiber composition comprising 1-30 wt % lignin, said cellulose fiber composition further having a solid content between 0.1-95%; providing a forming tool having a three dimensional shape including a forming surface, and bringing said forming surface into contact with the cellulose fiber composition; and press drying the cellulose fiber composition contacted by the forming tool at temperatures>200° C. to a dry content of at least 70%.

The invention also relates to a three dimensional fiber based product obtainable by means of said method.

Method of manufacturing a moulded pump product. The method includes activating a vacuum source, injecting an amount of pulp into the internal mould chamber through the mould opening, thereby forming a pulp preform on the internal mould surface, injecting a dewatering and heating fluid through the mould opening at gradually increasing pressure until a maximum pressure, thereby performing a dewatering and drying step whereby the pulp preform on the internal mould surface is dewatered and dried, deactivating the injection of dewatering and heating fluid, deactivating the vacuum source, and extracting the moulded pulp product. An option further step includes initiating rotation of the mould about the central axis thereof and increasing rotational speed gradually, maintaining a maximum rotational speed of the mould at least during a substantial part of the dewatering and drying step, decreasing rotational speed gradually until standstill of the mould.

A process for forming a pre-form for a moulded pulp fibre product involves providing a porous mould that has one or more pre-form mould portions that each have an outer surface corresponding to a surface of the pre-form. Pulp fibre slurry is discharged from an outlet; each pre-form mould portion is coated with discharged pulp fibre slurry by moving the porous mould relative to the outlet. Thus, a slurry deposit for the pre-form is formed on the outer surfaces of the pre-form mould portions. Fluid from the slurry deposit is extracted through the porous mould to form the pre-form.

A process for forming a pre-form for a moulded pulp fibre product involves providing a porous mould that has one or more pre-form mould portions that each have an outer surface corresponding to a surface of the pre-form. Pulp fibre slurry is discharged from an outlet; each pre-form mould portion is coated with discharged pulp fibre slurry by moving the porous mould relative to the outlet. Thus, a slurry deposit for the pre-form is formed on the outer surfaces of the pre-form mould portions. Fluid from the slurry deposit is extracted through the porous mould to form the pre-form.