58results about How to "Good low temperature heat sealability" patented technology

The invention discloses a composite membrane for sauce and a preparation method thereof. The composite membrane sequentially comprises a polyethylene glycol terephthalate layer, an aluminum foil layer, an ethylene acrylic multipolymer layer, a double-peak low-density polyethylene layer and a metallocene polyethylene blending and modifying resin layer. The preparation method is characterized by comprising the following steps: dry compounding, preparing the metallocene polyethylene blending and modifying resin layer and blending and compounding. Compared with the prior art, the composite membrane for sauce has high sealing strength, short hot seal time, good sealing effect, good sealing planeness, good pollution resistance, medium resistance, low cost, no delamination, and the like.

The invention relates to a transparent packaging film and a preparation method thereof. The transparent packaging film comprises an NY (nylon) film layer, an adhesive layer and a PE-NY (polyethylene-nylon) co-extrusion film which are tightly bonded, wherein the PE-NY co-extrusion film layer consists of a corona layer, a first adhesive layer, a middle layer, a second adhesive layer, a first heat sealing layer, a second heat sealing layer and a third heat sealing layer which are sequentially adhered together; the corona layer comprises 66.7 to 66.8wt% of linear low density polyethylene, 33.1 to33.3wt% of high-pressure low density polyethylene and 0.04 to 0.05wt% of fluoride processing additive; the first adhesive layer and the second adhesive layer comprise polyethylene bonding resin; the middle layer comprises copolymerizing nylon; the first heat sealing layer and the second heat sealing layer comprise metallocene polyethylene; the third heat sealing layer comprises 95 to 97wt% of metallocene polyethylene, 2 to 3wt% of smoothing agent and 1 to 2wt% of opening agent. The transparent packaging film is a composite film with good heat sealing and packaging adaptability.

The invention relates to the field of heat shrinkable films, in particular to a heat shrinkable film applicable to automatic quick packaging on a production line. The heat shrinkable film comprises anouter surface layer, a heat seal layer on the inner surface and a barrier layer between the outer surface layer and the heat seal layer. The barrier layer comprises an EVOH (ethylene-vinyl alcohol) barrier interlayer, at least one side of the EVOH barrier interlayer is provided with a barrier layer protecting layer which is a PA (polyamide) layer, the surface layer is a PA layer, and the heat seal layer is a POP (polyether polyol) layer or one of an mLLDPE (metallocene linear low density polyethylene) layer, a ULDPE (ultralow-density polyethylene) layer and a Surlyn resin layer or a POP and mLLDPE mixed layer. The surface layer and the barrier layer as well as the barrier layer and the heat seal layer are connected through adhesive resin. The heat shrinkable film is high in strength, great in barrier and heat seal performance, excellent in machinability and suitable for full-automatic online packaging. By the heat shrinkable film, the shrinkable bag packaging modes and packaging efficiency can be changed.

The invention relates to the field of packaging films, in particular to a POF shrinkage film applicable to cold fresh chicken packaging. The film is a five-layer co-extrusion film; the total thicknessis 10 to 100 microns; the film comprises an outer layer, a sub outer layer, a middle core layer, a sub inner layer and an inner layer hot sealing layer, wherein the middle core layer is an LLDPE layer; the outer layer and the sub outer layer is an LLDPE layer or a blending layer of LLDPE and LDPE; the sub inner layer is selected from one of the LLDPE layer, a ULDPE layer and the blending layer ofLLDPE and LDPE; the inner layer hot sealing layer is selected from one of the LLDPE layer, the ULDPE layer, a POP layer, an SURLYN layer and the blending layer of LLDPE and LDPE. The POF shrinkage film has excellent low-temperature hot sealing performance and efficient anti-pollution hot sealing performance.

The invention discloses a composite film. The composite film has an A/B/A, A/B/A/C or A/B/A/C/A layer structure, the A layer is modified poly epsilon-caprolactone, the B layer is at least one of aluminum or paper, and the C layer is at least one of polyamide, polyester, polyolefin and enol copolymer. The composite film has good heat sealability, good tensile mechanical properties and high peel strength. The composite material comprises biodegradable modified poly epsilon-caprolactone (layer A) as a heat sealing layer, a sealing layer and an outer protective layer. After the use period of the composite flexible package material ends, the modified poly epsilon-caprolactone with excellent biodegradability can be degraded within a certain period of time, so that all layers forming the composite material are separated due to connection loss, the problem that the composite flexible package material is difficult to recycle is solved, and the ecological environment effect is reduced through adegradation, classification and recycling technology.

A composite membrane for packing explosive is composed of an upper membrane, an intermediate membrane and a lower membrane by coextrusion; wherein the upper membrane is composed of polypropylene and slip strengthening master batch, the intermediate membrane is low-density polyethylene; and the lower membrane is composed of low-density polyethylene, linear low-density polyethylene, metallocene polyethylene and slip strengthening master batch. The invention has the advantages that: 1, cost is low and about 20% of cost can be saved; 2, the composite membrane has excellent low temperature heat sealing performance and meets safety requirement of explosive; and the composite membrane has resistance to low temperature, good tear strengthen and excellent transparency and luster; 3, the product is formed in one step by adopting coextrusion technology, contains no binder and can be completely recycled.

The invention relates to a low-temperature heat sealing coating film suitable for lightweight packaging. The coating film is a double-sided coating structure, and comprises a substrate, an upper coating layer on the upper surface of the substrate, a lower coating layer at the lower surface of the substrate, an upper primer layer between the substrate and the upper coating layer, and a lower primerlayer between the substrate and the lower coating layer, the upper primer layer and the lower primer layer are coatings layers formed by water-based polyurethane in the prior art, the substrate is abiaxially-oriented polypropylene film, the upper coating layer is a low-temperature heat sealing coating layer, and the lower coating layer is an acrylic coating layer; and the acrylic coating layer is a printed layer, the low-temperature heat sealing layer and the low-temperature heat sealing layer are heat-sealed during sealing, and the heat seal strength at 70 DEG C is 1.0-1.5 N/15 mm. The low-temperature heat sealing coating film has the advantage of good film rolling quality, no sticky phenomenon, good printing performance, implementation of packaging without compounding, and meeting requirements of high-speed packaging, and is especially for lightweight (less than 100 g) packaging of heat-sensitive foods.

The invention discloses a gas adsorption type inner-layer co-extrusion membrane for packaging of a lithium battery and a preparation method of the gas adsorption type inner-layer co-extrusion membrane, and particularly provides an inner-layer co-extrusion membrane, contacted with a polymer electrolyte solution, of a polymer lithium battery inner layer and a preparation method of the inner-layer co-extrusion membrane. The gas adsorption type inner-layer co-extrusion membrane is characterized by comprising a gas adsorption layer, an adhesion layer, a separation layer, a mechanical support layer and a hot sealing layer from outside to inside sequentially. The gas adsorption type inner-layer co-extrusion membrane is prepared through preparation of raw materials of all layers and co-extrusion of the adjacent layers. With the adoption of the gas adsorption type inner-layer co-extrusion membrane and the preparation method, the conditions of integral damage and liquid leakage of the flexible packaging can be avoided, the safety of the lithium battery is improved, and the service life of the lithium battery is prolonged.

The invention relates to the field of packaging materials, and in particular relates to a composite bag made of a non-woven fabric material, the composite bag comprises a surface printing layer, a reinforcing layer, a barrier layer and an inner film layer which are sequentially arranged, wherein the reinforcing layer is the non-woven fabric; the reinforcing layer is made of the non-woven fabric, the reinforcing layer is arranged in the composite bag; the non-woven fabric has the advantages of moisture resistance, ventilation, flexibility, light weight, no combustion supporting, easy decomposition, no toxicity, no irritation, rich colors, low price and recyclability; and the non-woven fabric has better tear resistance, so that the tear resistance of the composite bag can be improved.

The invention relates to a thin film and a preparation method thereof, in particular to a light conversion film, a multilayer light conversion film and a preparation method of the multilayer light conversion film. The light conversion film comprises a film body and a light conversion film layer, and the light conversion film layer comprises, by weight, 18%-22% of a light conversion agent, 55%-60%of an organic carrier, 13%-15% of a light stabilizer and 9%-12% of an antioxidant, wherein the film body comprises 60%-75% of a film matrix, 12%-20% of a light stabilizer and 10%-20% of an antioxidant; according to the method provided by the invention, by adding the light conversion agent, ultraviolet light in sunlight can be converted into red light, absorption of plants on nutrient elements suchas nitrogen, phosphorus, potassium and zinc is promoted, the content of photosynthesis products in leaves is increased, crop growth is promoted, and meanwhile, the effect of reducing diseases and insect pests is achieved.

The invention discloses an aluminum-plastic film for lithium battery packaging, which comprises an outer nylon composite layer, a polyurethane bonding layer, an aluminum alloy foil layer, a polyolefin bonding layer and a polypropylene composite layer which are arranged in sequence, the polypropylene composite layer is a three-layer co-extrusion composite film, the middle layer of the co-extrusion composite film is ultra-high molecular weight polyethylene toughened polypropylene, and the middle layer of the co-extrusion composite film is an aluminum alloy foil layer. The outer layer is co-polypropylene filled with nano filler, and the inner layer is co-polypropylene. Due to the addition of the nano filler, the mechanical property of polypropylene can be improved, the effect of neutralizing hydrofluoric acid is achieved, the low-temperature heat sealing property of the inner-layer film can be improved, and the corrosion resistance of the aluminum-plastic film is improved. The invention further discloses a preparation method of the aluminum-plastic film, the inner layer film of the aluminum-plastic film is manufactured in a hot compounding mode, plasma cleaning treatment is conducted on the surface of the aluminum foil firstly, then plasma etching is conducted on the cleaned aluminum foil, the bonding performance between the aluminum foil and a bonding agent can be improved, and the service life of the aluminum-plastic film is prolonged. Therefore, the corrosion resistance and humidity and heat resistance of the aluminum-plastic film are improved.

The invention relates to the field of packaging materials, in particular to a barrier coating and a high-barrier composite material applied in the barrier coating. The barrier coating is prepared fromthe following raw materials in percentage by mass: 8 to 20 percent of polyvinyl alcohol, 1 to 10 percent of vinylamine homopolymer, 0.1 to 0.2 percent of tetrabutyl titanate, 0.1 to 0.2 percent of silicon dioxide and the balance of water. The polyvinyl alcohol, the vinylamine homopolymer, the tetrabutyl titanate and the silicon dioxide in a specific mass ratio are added into the water for a mixing reaction, the effect of modifying the polyvinyl alcohol is achieved, the polyethylene barrier coating with high barrier performance is finally obtained, and compared with the aluminum foil, the polyethylene barrier coating has the advantage of being easy to recycle and meets the development requirement for environmental protection.

The invention discloses a transverse-longitudinal linear easy-to-tear film and a manufacturing process thereof. The transverse-longitudinal linear easy-to-tear film comprises COC, LLDPE and DDPE, wherein the mass fraction of COC is 20-50%, the mass fraction of LLDPE is 30-60%, the mass fraction of DDPE is 10-20%, and the manufacturing process of the transverse-longitudinal linear easy-to-tear filmcomprises the steps of feeding, hot melting and filtering, extrusion molding, tape casting and cooling, trimming and recycling, corona treatment and aging treatment. The film prepared from COC, LLDPEand DDPE is prepared from COC of LLDPE with a large mass fraction and a small amount of DDPE, the film is easier to tear while certain strength is provided, and in addition, a torn crack of the filmis a linear crack; by means of the manufacturing process, the product has good physical properties, especially the low-temperature heat sealing performance is excellent, and the heat sealing temperature is 103-105 DEG C; and the product can be used for compounding to form easy-to-tear films with different properties.

The invention discloses a traceless hot glue wall cloth production device and production process. The traceless hot glue wall cloth production device comprises a base plate; an unwinding machine is fixedly installed on the upper surface of the base plate; a feeding plate is arranged on one side of the unwinding machine; a tension device is arranged on the other side of the unwinding machine; a coating device is arranged at the rear end of the tension device; a heat preservation device is arranged above the coating device; a drying device is arranged at the tail end of the interior of the coating device; a cooling device is arranged at the rear end of the coating device; a screw extruder installed on a supporting framework is arranged over the cooling device; and a thickness measuring device, a corona device, the tension device, an auxiliary device, a cutter device, a receiving device and a discharging trolley are sequentially arranged at the rear end of the cooling device. According to the production device, the heat preservation device is additionally arranged on an existing hot glue compounding machine, so that the temperature of raw materials is guaranteed when the production device is used, electric energy consumption for heating is reduced, and the processing cost is saved.