The present invention provides a hydrophobic thermoplastic starch and method for manufacturing the same, to be used as granules for making biodegradable composites. The hydrophobic thermoplastic Starch of the invention is in a granule type, has the melt flow index in the range of 0.2-6 g/10 min at 160° C. and has 60-80 wt % of starch and the water content less than 9%.

A method of making a dispenser includes: mixing a plurality of materials, the materials including plant fiber, vegetable gum, starch, a toughening agent, and a dispersing agent; utilizing a granulator to form the mixture of the plant fiber, the vegetable gum, the starch, the toughening agent, and the dispersing agent into pellets; and forming a dispenser by moving the pellets into a processing machine; wherein the processing machine melts the pellets and disposes the melted material into a cavity configured as a forming mold, and after cooling the dispenser is obtained.

A packaging film is provided. The packaging film includes a polymer matrix composed of poly (butylene succinate) (PBS), and a modified tapioca starch (TPS), where a weight ratio (w/w) of the PBS to the TPS is in a range of 3:2 to 2:3. The packaging film also includes an antimicrobial composite including an organometallic compound dispersed within the polymer matrix. The packaging film has a water vapor permeability in a range of 94,000-95,000 micrometer gram per second per square meter per pascal (g.Math.μm/m.sup.2.Math.s.Math.Pa). A method to prepare the packaging film is also disclosed. The packaging films of the present disclosure prevent or inhibit the growth of gram-positive bacteria and gram-negative bacteria, particularly on food surfaces.

The present invention is directed to a fully biodegradable material based on a plant protein. The present invention is also directed to a process method of making a gluten-based biodegradable material by a water induced flocculation step. A fully hydrated gluten dough with or without an additive or/and a filler formed from the flocculation step, which has low viscoelasticity, is further molded into an article with desired shapes under a low shear stress in a relatively low temperature range. A rigid or flexible biodegradable plastic article is obtained by removing extra water at a temperature lower than decomposition temperature of the gluten.

The invention relates to a method for producing a compound or a film containing thermoplastic starch, an alpha-hydroxycarboxylic acid ROHCOOH, in which R is CH.sub.2 or CH.sub.3CH.sub.2, in an amount of from 0.1 to 5, preferably 0.1 to 3, particularly preferably 0.1 to 1 wt. % in relation to the thermoplastic starch, and a thermoplastic polymer, in which method the compound or the film is exposed during or after its extrusion to an additional heating step to 100-140° C. A thermoplastic starch usable for the production of the compound, a compound produced by the method, and a transparent film produced from such a compound are also described.

A separating system for separating or separating items formed in a cavity of an injection molding system to separate them from material in the mold's runner, has a clamp plate for anchoring the separator system. The clamp plate secures a separating plate that supports a first separating pin, either directly or via an actuator. The first separating pin includes a base, a body having a cross-sectional portion, a neck having a cross-sectional portion, and a wedge-shaped tip. The system includes a support plate that supports a cavity plate, where the cavity plate has a first cavity and a first gate that fluidly couples the first cavity to a first runner channel. The separating first separating pin can be articulated to separate a molded material at a boundary between the first gate and the first cavity.

The present invention is an ultrasonic sealing method for sealing together multiple layers, of materials of different composite and may be dissimilar in nature the method comprising the steps of, a) feeding at least two work-pieces between an ultrasonic horn and an anvil, wherein said at least two work-pieces comprise a shipping envelope mailer with or without a cushion layer as a variable layered material b) sealing said two work-pieces, wherein said sealing comprises, (i) the outer layers may or may not be pre coated with a polymer and (ii) generating vibratory energy by a transducer and applying it to the horn which causes the horn to vibrate, wherein the frictional forces caused between the vibrating horn, and the anvil produces heat which is used to seal the two work-pieces together.

The present invention is an ultrasonic sealing method for sealing together multiple layers, of materials of different composite and may be dissimilar in nature the method comprising the steps of, a) feeding at least two work-pieces between an ultrasonic horn and an anvil, wherein said at least two work-pieces comprise a shipping envelope mailer with or without a cushion layer as a variable layered material b) sealing said two work-pieces, wherein said sealing comprises, (i) the outer layers may or may not be pre coated with a polymer and (ii) generating vibratory energy by a transducer and applying it to the horn which causes the horn to vibrate, wherein the frictional forces caused between the vibrating horn, and the anvil produces heat which is used to seal the two work-pieces together.

A process for injection molded microcellular foaming various flexible foam compositions from biodegradable and industrially compostable bio-derived thermoplastic resins for use in, for example, footwear components, seating components, protective gear components, and watersport accessories wherein a process of manufacturing includes the steps of: producing a suitable thermoplastic biopolymer or biopolymer blend; injection molding the thermoplastic biopolymer or biopolymer blend into a suitable mold shape with inert nitrogen gas; controlling the polymer melt, pressure, temperature, and time such that a desirable flexible foam is formed; and utilizing gas counterpressure in the injection molding process to ensure the optimal foam structure with the least amount of cosmetic defects and little to no plastic skin on the outside of the foamed structure.

The invention discloses a starch-based multi-channel airflow unit and a preparation method and an application thereof. The preparation method of the present invention comprises the following steps: melting a polylactic acid, wherein a temperature of a first temperature control zone is 135° C. to 145° C., a temperature of a second temperature control zone is 175° C. to 185° C., a temperature of a third temperature control zone is 190° C. to 200° C., and a temperature of a fourth temperature control zone is 175° C. to 185° C.; gelatinizing a starch-based material, adding the starch-based material in the third temperature control zone and fully mixing the mixture; adding a polyol in the third temperature control zone, and fully mixing the mixture; and extruding out the mixed material through twin screws, sizing in vacuum, cooling and sizing, and winding and cutting to obtain the starch-based multi-channel airflow unit.