16 results about "Food packaging" patented technology

Sulfonated aromatic copolyesters and articles made therefrom, and processes for producing the sulfonated aromatic copolyesters and articles are provided. Articles that can be made from the sulfonated aromatic copolyesters include films, coatings and laminates. Some of the compositions and articles are biocompostable. The films can further be used to form shaped articles such as sheets, food packaging such as sandwich wraps, thermoformed containers, and coatings for, for example, films and other substrates. The sulfonated aromatic copolyesters contain a hydroxyalkanoic acid component.

The invention discloses a polyvinyl alcohol/xylan biodegradable composite membrane and a preparation method and an application thereof. The preparation method comprises the following steps: adding polyvinyl alcohol into water, dissolving for 1-4 hours at a temperature of 80-100 DEG C, adding and uniformly mixing xylan and citric acid and controlling the mass ratio of the xylan to the citric acid to be 1:1-4:1; and agitating obtained mixed solution for 2-6 hours at a temperature of 50-80 DEG C, standing, casting on a horizontally-arranged clean polyfluortetraethylene plate and vacuum-drying to obtain the polyvinyl alcohol/xylan biodegradable composite membrane. The polyvinyl alcohol/xylan biodegradable composite membrane and the preparation method and the application thereof have the benefits that the composite membrane has a tensile strength of 7.58-37.42 MPa and an elongation at break of 13.67-249.50 percent; the process is simple, the reaction conditions are easy to control, no environmental pollution is generated in the production process, and the industrialization is easy; and the composite membrane is innocuous, has good biodegradability and higher strength and can be applied to food packaging materials.

The invention discloses a food packaging bag and relates to the field of packaging materials. The food packaging bag comprises an outer layer and an inner layer; the inner layer is a graphene antibacterial layer which is provided with small holes; the outer layer is a plastic layer; preservative is arranged between the inner layer and the outer layer. The food packaging bag has the advantages of reducing the contact area of the food preservative and food, achieving the antiseptic purpose, reducing the content of the preservative in the food, solving the food security problem caused by the preservative, avoiding bacteria breeding of the food due to the antibacterial layer and increasing the food security.

The invention discloses packaged food packaging equipment and relates to the field of packaging equipment. The packaged food packaging equipment comprises a machine frame, a first transportation device, a charging groove, a second transportation device, a sucking disc, a packaging bag, an expanding device, a control mechanism, a fixing frame, a bag sealing device, a sealing plastic head and an air cylinder, wherein the first transportation device is arranged on the machine frame; the charging groove is hinged to the machine frame through an articulated shaft; the charging groove is connected with the air cylinder; the second transportation device and the first transportation device are perpendicular in the cross direction; the bottom of the packaging bag can be erected; the sucking disc is arranged below the second transportation device; the expanding device is installed on the fixing frame and connected with the control mechanism; the bag sealing device is arranged on the other side of the second transportation device; the sealing plastic head of the bag sealing device is connected with the air cylinder. The packaged food packaging equipment has the beneficial effects of being simple in structure, small in floor space, convenient to use, low in equipment cost, mechanical and automatic in operation procedure, and capable of improving the production efficiency and controlling the hygienic quality of food conveniently.

The invention relates to a food packaging bag and a preparation method thereof and belongs to the field of plastic product processing. The food packaging bag is prepared from, by weight, 60-90 parts of polypropylene, 0.5-4 parts of coupling agent, 1-5 parts of filler, 3-12 parts of starch, 5-15 parts of cellulose, 4-7 parts of vermiculite power, 2-8 parts of insect repellant, 1-7 parts of preservative and 1-3 parts of flexibilizer. The food packaging bag is high in mechanical strength, resistant to stretching, low in mass and good in anti-tear performance, and meanwhile has good low-temperature impact resistance; by adding the insect repellant, the food bag has the effects of resisting mildew and repelling insects, and the raw materials are easy to obtain, purely naturally, safe and environmentally friendly; the preparation method is simple, the cost of the raw materials is low, the requirement on mechanical equipment is not high, large-scale application and popularization are easy, and good economic benefits are achieved.

The invention relates to a packaging for foodstuffs, comprising: a receptacle ( 10 ) having a displaceable part ( 16 ) which forms part of the bottom, the body part or the lid, which part is connected to the remaining peripheral part ( 16 ) of respectively the bottom, the body part or the lid by an elastically deformable coupling edge ( 17 ), such that the displaceable part is movable between a first position displaced to the outside and a second position displaced to the inside. The packaging has the feature that the displaceable part has a generally rectangular shape corresponding with the shape of said remaining part of the bottom, the body or the lid; the surface area of the displaceable part amounts to at least 50% of the total surface area of the bottom, the body or the lid; the displaceable part has bending stiffness.

The invention discloses a Raman spectrum detection method of a phthalate plasticizer. A surface enhanced Raman spectrum (SERS) method is used to detect phthalate in food package and the migration of phthalate in fat soluble food. The provided detection method can rapidly and accurately measure the content of phthalate in food package and the migration amount of phthalate in fat soluble food, and has the advantages of convenient operation, low instrument cost, few samples, and simple pretreatment.

The invention belongs to the technical field of food packaging, and particularly relates to a preparation method of an environment-friendly food packaging material. The environment-friendly food packaging material is processed from pure natural materials, the preparation process is simple, and the prepared packaging material is long in service life, uniform, firm in structure, low in cost, capable of being completely biodegraded, free of environmental pollution, is easy to industrially produce on a large scale, has an antiviral function and can prevent virus transmission, the degradation speed of the degradable packaging material is higher than that of an existing food-grade degradable packaging material, the dissolution speed in water is less than 12 hours, and the material is pure natural, non-toxic and harmless and does not cause pollution to a water source.

The invention discloses a food packing machine vacuum chamber mounting assembly. The food packing machine vacuum chamber mounting assembly is provided with a vertical column, a shaft sleeve, a cavity mounting plate, an air dividing base, a middle shaft and a connecting bracket. The shaft sleeve is rotatably mounted on the vertical column in a sleeving mode; the cavity mounting plate is fixed at the upper end of the shaft sleeve; the air dividing base is fixedly mounted at the upper end of the vertical column; the middle shaft is mounted on the air dividing base; an air dividing bottom disc, an air dividing middle disc and an air dividing upper disc are sequentially laminated on the air dividing base and are rotatably mounted on the middle shaft in a sleeving mode; air channels are formed in the air dividing bottom disc, the air dividing middle disc and the air dividing upper disc and communicate with the air dividing bottom disc, the air dividing middle disc and the air dividing upper disc; a vacuum pipe connector is arranged on the air dividing upper disc and communicates with the air channel in the air dividing upper disc; and the connecting bracket is connected with the cavity mounting plate and the air dividing upper disc. In the process of station rotation, air pipes are not wound in the vacuum pumping process.

The invention discloses a food packaging bag film slitting device, and relates to the technical field of food packaging bag slitting, the food packaging bag film slitting device comprises a main body, a rotating shaft is arranged on one side of the main body, a winding device is arranged above the rotating shaft, a driving motor is arranged on one side of the winding device, a feeding device is arranged above the winding device, and a cutting device is arranged above the feeding device. Pressing wheels are arranged on the two sides of the feeding device, an equal-part cutting device is arranged on one sides of the pressing wheels, and an anti-falling plate is arranged at the upper end of the feeding device. Under the combined action of a winding roller, a wear-resistant layer, a roller body half shaft, a connecting rod and a roller body anti-deformation mechanism, a cut film can be wound in time, so that the film is not prone to accumulation, later storage of the film is facilitated, meanwhile, the film can be prevented from being damaged, and under the combined action of a fixed base, a fixing bolt, a movable base, a movable rotating shaft and a feeding sleeve shaft, the film is prevented from being damaged. The feeding speed of the slitting device can be increased, and therefore the working efficiency of the slitting device is improved.

The invention relates to a high-strength food packaging film and a manufacturing method thereof. The high-strength food packaging film is characterized by being prepared from, by weight, 200-250 parts of base resin, 22-25 parts of antioxidant, 2.2-3.4 parts of styrol copolymer, 6-9 parts of antioxidant, 2.6-2.8 parts of auxiliary antioxidant, 13-18 parts of heat stabilizer, 13-15 parts of polypropylene, 1-1.5 parts of zeolite, 2.2-3.0 parts of glutaraldehyde, 1.4-2.3 parts of acetic acid, 100-200 parts of LLDPE, 3.4-5.3 parts of stabilizer, 2.8-3.5 parts of pentaerythritol tallate, 3.4-6.3 parts of butadiene, 1.4-2.0 parts of heat stabilizer and 1.4-2.0 parts of antistatic agent. The food packaging film has the advantages that the defects that the own strength of a film is low, and the film cannot be torn easily and is fractured easily when folded are overcome, the hardness of the film is improved, and the film can adapt to environment conditions such as external temperature and humidity and has comprehensive water and gas resisting performance.