290 results about "Plastic wrap" patented technology

The invention relates to the technical field of polymer composite materials, in particular to a degradable PPC-based composite film as well as a preparation method and application thereof. The degradable PPC-based composite film is prepared from polypropylene carbonate, bamboo powder and vinyl trimethoxy silane. Polypropylene carbonate (PPC) is adopted as a base material, bamboo powder is combined for filling, the prepared composite film can be completely degraded after being buried in natural soil for 5 months, and degradation products of the composite film do not pollute the environment; the bamboo powder is adopted as a reinforcing filler, has a certain bacteriostatic effect, and can be used for delaying the growth of microorganisms on the surface of food and improving the food safety and the fresh-keeping effect if being applied to the food fresh-keeping film. Compared with a pure PPC film, the composite film disclosed by the invention is improved in the aspects of mechanical property, thermal stability and glass transition temperature, and shows more excellent comprehensive performance.

The invention discloses a chitosan-based preservative film with a pH colorimetric function as well as a preparation method and application of the chitosan-based preservative film. The chitosan-based preservative film is prepared from the following preparation raw materials: chitosan, cellulose nanofibers, a deep eutectic solvent and a beet red-zinc ion complex. Wherein the chitosan enables the film to have antibacterial property; the cellulose nanofiber can enhance the tensile strength and toughness and reduce the water vapor / oxygen permeation coefficient; the beet red-zinc ion complex has the characteristic of more stable color development, and the color difference response delta E to pH 2-12 is greater than or equal to 8. The chitosan-based preservative film disclosed by the invention can be applied to food fresh-keeping packaging and food freshness monitoring; the preservative film disclosed by the invention can be used for effectively prolonging the service life of fruits and vegetables while ensuring the food safety; in food freshness monitoring application, the preservative film changes from low-pH-value orange to high-pH-value yellow according to the change of acid-base conditions, and the preservative film can be used as a pH colorimetric sensing film for freshness monitoring.

The utility model relates to the technical field of blister boxes, and discloses a portable blister box which comprises a lower box body, an upper box cover and a lifting rope. A bending connecting plate is fixedly connected between the lower box body and the upper box cover, a connecting clamping groove is fixedly connected to the lower box body, a connecting buckle is fixedly connected to the upper box cover, and the connecting clamping groove and the connecting buckle are in interference fit with each other; edge lugs are fixedly connected to the two sides of the lower box body, fixing cylinders are fixedly connected into the edge lugs, hanging grooves are formed in the outer sides of the fixing cylinders, elastic buckle plates are installed in the hanging grooves, and the lifting ropes are arranged in the fixing cylinders. According to the plastic uptake box, a set of hanging grooves are additionally formed in the two sides of the plastic uptake box in the mode that the side lugs are installed on the two sides of the plastic uptake box, at the moment, a worker can twist the preservative film into the carrying rope, the carrying rope is knotted at the two ends of the carrying rope, and therefore the plastic uptake box is convenient to use. The carrying rope and the hanging groove are mutually assembled, so that the handle is additionally arranged on the blister box, and the blister box is convenient to carry by people.

The invention relates to the technical field of food fresh-keeping materials, and discloses a preparation method of an intelligent response degradable fruit and vegetable fresh-keeping film based on a Janus structure, the intelligent response degradable fruit and vegetable fresh-keeping film comprises a hydrophobic layer and a hydrophilic layer, the hydrophobic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid, and the hydrophilic layer is an electrostatic spinning film formed by compounding eugenol-loaded ZIF-8 nano-particles and polylactic acid. The hydrophilic layer is an electrostatic spinning membrane formed by compounding chitosan and gelatin, the surface of the hydrophobic layer is covered with the hydrophilic layer through an electrostatic spinning technology, the ZIF-8 nanoparticles are synthesized through a room-temperature stirring method, and synthesis raw materials are a 2-methylimidazole methanol solution and a zinc nitrate methanol solution. By means of the pH response characteristic of the ZIF-8 nano-particles, pH value change signals generated in the early stage of fruit and vegetable putrefaction can be sensitively captured, loaded antibacterial components are accurately released through ZIF-8 framework dissociation, targeted inhibition on putrefying bacteria is achieved, passive protection is converted into active intervention, the fruit and vegetable putrefaction process is effectively delayed, the fresh-keeping effect is improved, and the fresh-keeping time is prolonged.

The invention belongs to the technical field of degradable packaging materials, and discloses a preparation method of a degradable preservative film. The anti-fog antibacterial plastic is prepared from the following raw materials in parts by weight: 40 to 45 parts of poly (butylene adipate-co-terephthalate) (PBAT), 8 to 12 parts of polylactic acid (PLA), 28 to 32 parts of modified structural starch, 4 to 6 parts of poly (butylene carbonate) (PBC), 4 to 6 parts of talcum powder, 0.4 to 0.6 part of aluminate, 0.8 to 1.2 parts of a composite antibacterial agent and 2.5 to 3.5 parts of anti-fog master batch. The invention aims to overcome the defects in the prior art, and provides the degradable preservative film and the preparation method thereof, the preservative film not only has good degradability and mechanical properties, but also has excellent antibacterial and antifogging effects, and the preparation process is simple and easy for industrial production.

A paint workstation includes several integral structures characteristics that provide convenient resources for painting projects, with such structures supported by adjustable legs and configured to hold several necessary tools. A main body of the workstation has compartments specifically configured to contain paint cans, paint brushes, tape, plastic wrap, etc. Further an integral paint roller tray is formed as part of the main body, and a removable paint roller holder is configured to be attached to the main body at a position adjacent the roller tray. The roller holder is configured to hold a paint roller in a position that is partially within the paint roller tray, but not to sit in a bottom reservoir portion of the tray. Additional accessories include attachable trays and components that allow the workstation to be configured in a manner that is very flexible and tailored to the painter's needs.

The invention relates to polylactic acid carbon dots as well as a PLA / PVA (polylactic acid / polyvinyl alcohol)-based full-biodegradable polyester composite material and a preservative film thereof. The polylactic acid carbon dots are prepared by a microwave irradiation method, and the full-biodegradable polyester composite material takes PLA as a main base material, PVA as auxiliary resin, food-grade talcum powder as a filler, the polylactic acid carbon dots as a compatilizer, glycerol and stearic acid as lubricants and B215 as an antioxidant. Performing high-speed mixing and stirring to obtain a modified mixture, extruding and pelletizing the modified mixture to obtain a full-biodegradable polyester composite material, and performing film blowing on the polyester composite material to obtain the full-biodegradable preservative film. The polyester composite material prepared by the invention can be biodegraded under a matured compost condition (the test period is 140 days), the biodegradation rate is 91.79%, the relative biodegradation rate is 97.15%, the products are carbon dioxide and water, and inspection items such as the total migration amount and heavy metals meet standard requirements.

The invention discloses an in-situ pulp incubation method for click chemical imaging analysis of postharvest lignification of fruits. The in-situ pulp incubation method comprises the following steps: (1) preparing a high-concentration hydrogel solution and a low-concentration hydrogel solution; (2) preparing a CA-Alk working solution and a CA-Alk-containing hydrogel incubation solution; (3) cutting a wound on the fruit with a knife to expose pulp, soaking the wound of the fruit in a CA-Alk working solution for 24 hours, taking out the fruit, then coating the surface of the wound with a hydrogel incubation solution containing CA-Alk, and curing to form a first gel layer; and then coating the first gel layer with the high-concentration hydrogel liquid, and coating the first gel layer with a preservative film for fixation. According to the method, the integrity of pulp cells is almost not damaged when observed under an optical microscope, and the incubation time can last from original 1-2 days to 7 days or above. Meanwhile, due to in-situ incubation, the reaction on the lignin accumulation rule is more accurate.

The utility model relates to the technical field of vegetable packaging, in particular to a preservative film winding device for carrot packaging, and solves the problems that in the prior art, when carrots are packaged with preservative films, manual winding packaging is generally adopted, time and labor are wasted, and the packaging efficiency is high. And meanwhile, the compaction degree of the carrots wound with the preservative film can be greatly reduced. A preservative film winding device for carrot packaging comprises a frame body, one side of the outer portion of the frame body is fixedly connected with a driving motor through bolts, one side of the inner side of the frame body is rotationally connected with a rotating rod, one end of the rotating rod is fixedly connected with a bearing disc, and the other end of the rotating rod penetrates through the side wall of the frame body and is in transmission connection with an output shaft of the driving motor. According to the plastic wrap winding device, high-efficiency winding of plastic wrap is achieved, manpower and time cost are greatly saved, and the problem that time and labor are wasted in a traditional mode is solved.

The utility model discloses a plum preservation and storage device, and relates to the technical field of plum preservation. Comprising a side supporting frame, a transverse frame is fixedly arranged on the side supporting frame, a frame is fixedly arranged on the transverse frame, a hanging rod is arranged on the frame in a sliding mode, a mounting plate is fixedly arranged on the side supporting frame, a preservative film roll is fixedly arranged on the mounting plate, an inner supporting plate is fixedly arranged on the hanging rod, and a bearing frame is arranged on the inner supporting plate in a sliding mode. And a stop lever is arranged on the bearing frame. Through cooperative operation of the hanging rod, the preservative film roll, the bearing frame and other components, precise film covering of the plum frames is achieved. During storage, each frame of plums can be quickly and accurately wrapped with a preservative film, direct contact between outside air and dust and fruits is effectively blocked, the respiration and moisture evaporation rate of the plums are greatly reduced, the preservation time is remarkably prolonged, the wizened and rotting risks of the fruits are reduced, and it is ensured that the plums stored for a long time are still fresh and juicy; and good taste and appearance quality are maintained.

1. Name of this design product: Telescopic food storage box holder. 2. Purpose of this design: A bracket for holding food wrap boxes. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the key design points: Design 3 3D diagram. 5. Design 3 is designated as the basic design.

The utility model relates to the technical field of preservative film preparation, and discloses a degradable preservative film preparation device which solves the problems in the background technology and comprises a feeding port, an extrusion plasticizing mechanism is arranged at the bottom of the feeding port, and a forming module is arranged at the end, away from the feeding port, of the extrusion plasticizing mechanism. The forming module comprises a first mold plate, the first mold plate is connected with the tail end of the extrusion plasticizing mechanism, the first mold plate is sleeved with a second mold plate, the two ends of the second mold plate are in threaded connection with lead screws, the two lead screws are connected with the output end of a rotating motor, and a through hole is formed in the first mold plate; the mold has the advantages that the mold does not need to be frequently replaced, the production and storage cost of the mold is reduced, the mold can be immediately completed according to the market requirement or the change of the product specification, and the production flexibility is greatly improved.

The invention relates to an automatic preservative film wrapping device which comprises a frame, a plurality of corner connectors, a drawing mechanism, a lifting mechanism and a wrapping mechanism. The multiple corner connectors are fixedly arranged at the connecting positions of the frames. The drawing mechanism is arranged on the frame; the lifting mechanism is arranged on the frame; the coating mechanism is arranged on the frame; the lifting mechanism comprises a first driving assembly, a first placing plate, a second placing plate, a limiting block and a plurality of fixing assemblies; the first driving assembly is arranged on the frame; the first placing plate is arranged on the first driving assembly; the second placing plate is rotatably arranged on the first placing plate; the limiting block is fixedly arranged on the frame and arranged on the first driving assembly in a sleeving mode. And the plurality of fixing assemblies are arranged on the second placing plate.

1. Name of the designed product: packing box (preservative film). 2. Use of the designed product: packing box for placing preservative film. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

1. The name of the design product: preservative film storage box. 2. The use of the design product: for storing preservative film. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a preparation method of a waxberry composite preservative film, which comprises the following steps: adding waxberry anthocyanin, waxberry carbon dots and a plasticizer into a gelatin-K-carrageenan solution, uniformly stirring and mixing, ultrasonically degassing, forming a film by using a mixed solution, and drying at room temperature to obtain the waxberry composite preservative film, the preservative film has good water vapor and oxygen barrier property and excellent mechanical property; in addition, the film shows freshness indicating ability through pH responsiveness; meanwhile, the adopted preparation method is easy to operate and free of special equipment requirements, high-value utilization of waxberry waste is achieved, and the prepared composite preservative film has a huge application market prospect in the field of fresh-keeping packaging of meat which is prone to oxidation and microorganism breeding.

The invention discloses a plastic wrapping film production raw material stirrer, and relates to the technical field of plastic wrapping film production. The main shaft is vertically mounted in the middle of the stirring barrel body through a bearing, and spiral blades are arranged on the periphery of the main shaft; the driving module is mounted at the upper end of the stirring barrel, and the output end of the driving module is in transmission connection with the upper end of the spindle for driving the spindle to rotate; the cooling pipe is embedded in the main shaft and is used for introducing a cooling medium to take away heat generated in the stirring process; the cooling box body is fixedly mounted at the upper end of the stirring barrel body; the feeding tank body is mounted on the side part of the lower end of the stirring barrel body and is communicated with the bottom of the stirring barrel body through a through hole. According to the plastic wrapping film production raw material stirrer, precise temperature control is achieved through the built-in rotary cooling pipe and a closed circulation system, and thermal degradation of raw materials is inhibited; and the shaft body is linked with the piston piece and the material limiting plate, so that cooling pressurization and quantitative discharging are synchronously completed with single power, and the stirring uniformity, the automation level and the operation stability are improved.

The present application relates to the technical field of vegetable packaging, and particularly relates to a vegetable packaging machine, which comprises a packaging table, a winding unit for driving a preservative film to wind around vegetables is arranged on the packaging table, an avoiding hole matched with the winding unit is arranged on the packaging table, a supporting roller for supporting the bottom of the preservative film is arranged below the packaging table, two pressing rollers for supporting the top of the preservative film are arranged below the packaging table, and an adjusting structure for adjusting the positions of the supporting roller and the pressing rollers is arranged on the packaging table; the adjusting structure drives the pressing roller and the supporting roller to move to the winding track in sequence, and accurately positions the preservative film upwards and downwards, thereby creating a stable and accurate operation window for subsequent clamping and cutting, and solving the industry problem that the clamping mechanism is difficult to accurately grasp the preservative film due to the thin and soft preservative film and easy drift.

The invention discloses a sea grass preservative film and a preparation method thereof, and relates to the technical field of preservative film preparation. Aiming at the problems of serious pollution and difficult degradation of the existing plastic product, the invention takes sea grass and starch as core raw materials and is prepared by the steps of sea grass raw material pretreatment, extract preparation, gel mixture preparation, calcium ion crosslinking, airing and the like. The seaweed extract and the starch are subjected to synergistic interaction through hydrogen bond physical crosslinking and thermal gelation to form a stable film structure, the raw materials are food-grade, and the seaweed film has toughness and complete degradability, is free of harm to the environment and human bodies, can be widely applied to food packaging, field film covering, packaging products and other scenes, effectively replaces traditional plastic products, and solves the problem of plastic pollution.

The present application relates to the field of food processing technology, and more particularly to a modified frozen dough with oxidized konjac polysaccharide and a preparation method thereof. The frozen dough comprises the following raw materials in parts by weight: 850-950 parts of flour, 500-600 parts of water, 2.55-9.5 parts of oxidized konjac polysaccharide, 8.5-14.25 parts of calcium gluconate, 0.25-1 part of zinc gluconate, and 8-60 parts of a leavening agent. The leavening agent is yeast or baking powder. In the preparation, the oxidized konjac polysaccharide, calcium gluconate and zinc gluconate are uniformly dispersed in water, and then subjected to high-pressure homogenization and plasma treatment. All the raw materials are put into a dough mixer, mixed at low speed for 1-3 min, and then mixed at high speed for 3-5 min. After mixing, the dough is divided into small doughs, and rolled into small balls. The doughs are wrapped with plastic wrap and quickly frozen. The frozen dough has improved stability, and the deterioration of the specific volume of the food made from the frozen dough is improved.

1. The name of the design product: kitchen storage rack (four-piece set can be split). 2. The use of the design product: kitchen garbage bag, preservative bag, preservative film, kitchen paper storage and use combination. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: reference Figure 1 in the combined state. 5. Component 3 is symmetrical to component 1, and all views of component 3 are omitted; component 4 is the same as component 2, and all views of component 4 are omitted.

This invention discloses a method for preparing large-scale, original-color seaweed specimens, belonging to the field of seaweed preparation methods. The method includes the following steps: S1: Collecting algal bodies with reproductive organs and basal holdfasts; S2: Washing the algal bodies from S1 with pretreated water, selecting algal bodies with intact reproductive organs and basal holdfasts, and drying them; S3: Completely wrapping the algal bodies from S2 with plastic wrap and irradiating them with ultraviolet light; S4: Preparing a preservation solution; S5: Immersing the algal bodies from S3 in the preservation solution; removing them after 5 minutes; S6: Preparing the original-color specimen: removing the algal bodies from S5, placing them in a paper bag, and air-drying them in a dry, ventilated location. The dried specimen is then the original-color specimen. This method can produce original-color seaweed specimens.

1. The name of the design product: packaging sheet (food preservation film cover). 2. The use of the design product: mainly used for food preservation, which can effectively prevent dust and odor diffusion. 3. The design points of the design product: the combination of patterns and colors. 4. The picture or photo that best indicates the design points: front view. 5. The design for which protection is sought includes color. 6. The design product is a thin product, and the perspective view, top view, bottom view, left view, right view, and rear view are omitted.

The present invention discloses a branch cutting protection device, which relates to the technical field of forestry pruning equipment. The key points of the technical solution are that it includes a main body base, a side support frame arranged at the side end of the main body base, and a handle arranged on the side support frame. The main body base is provided with a track seat, and a cutting blade holder is provided on the track seat; a positioning frame rod is provided on the opposite side of the cutting blade holder, and the track seat is also provided with a film pulling mechanism for pulling plastic wrap and a drug applying mechanism for applying medicine to one side of the plastic wrap when the plastic wrap is pulled out. This device is provided with a cutting blade holder, a first frame rod, and a second frame rod, and ointment is stored inside the first frame rod, and a roll of plastic wrap is placed inside the second frame rod. Then, in conjunction with the arrangement of the film pulling mechanism and the drug applying mechanism, the cutting blade holder can simultaneously pull and stretch the plastic wrap inside the second frame rod and apply ointment to the side of the plastic wrap opposite to the cut surface of the branch during the process of cutting and moving back the branch, thereby enhancing work continuity and improving work efficiency.

The application relates to the technical field of preservative film production, and discloses a waste on-line crushing and melting granulation integrated device for preservative film production, which comprises a base, a main integrated material bin is fixedly installed at the top of the base, a collecting box is fixedly installed above the main integrated material bin, a feeding bag is arranged on one side of the collecting box, a hopper is arranged on the inner side of the main integrated material bin, a guide block is slidably connected above the hopper, a rotating strip is rotatably arranged on one side of the guide block, and a plug rod is rotatably connected in the rotating strip. The closed integrated system is used to save the intermediate transportation and storage link, the quality of the regenerated material is guaranteed from the source, the mechanical compaction, the spray humidification and the pulse purging are combined to ensure the continuous and stable feeding, the core rod, the limiting rod and the exhaust filtering design are finally matched, the regenerated material with uniform particles and high purity is output, the preservative film waste fragments are further promoted to fall down, the bridging obstruction is reduced, and the production quality of the whole preservative film is improved.