56results about How to "Good heat sealing effect" patented technology

The invention relates to a film for suction plastic packaging of medical equipment and a method for preparing the same. The film adopts a five-layer structure; the first layer is a heat seal layer A, of which the component is co-mixing resin of linear low-density polyethylene and metallocene catalytic polyethylene taking octene as a comonomer, wherein the content of the metallocene catalytic polyethylene in the co-mixing resin is 20 to 40 weight percent; the second layer is an inner layer B, of which the component is linear low-density polyethylene containing a hexene comonomer; the third layer is a core layer, of which the component is linear low-density polyethylene containing a butene comonomer; the fourth layer is a bonding layer D, of which the component is maleic anhydride grafted polyethylene; and the fifth layer is a weathering resistant layer E, of which the component is nylon 6 or 66. The preparation method comprises the following steps that: the bottom blowing water cooling type co-extrusion process or flow casting method is adopted, and the plastics is subjected to fusion and die inflation or flow casting, and quick cooling at water temperature of between 15 and 18 DEG C. The film and the preparation method have the advantages that: the method is simple; the products have merits of various resins; the film can be thermally sealed with the dialyzing paper without glum spreading; and moreover, the method and the film also have the advantages of low film thickness, good comprehensive property and reutilization.

The invention discloses an online double-layer composite plastic blow-molding film sheet which is formed by softening inner layers of a plurality of layers membrane bubbles which are co-extruded and blow-molded, wherein the inner layers of the membrane bubbles consist of EVA, COC and SEBS; a melting point of materials of the outer layers of the membrane bubbles is higher than a Vica softening point of the materials of the inner layer of the membrane bubbles. By optimizing the materials of the inner layers of the membrane bubbles, sticking is inhibited when the hot-pressing effect is improved, the thickness uniformity, the transparency, the heat-sealing uniformity, and the like of the membrane sheet are improved, the prepared membrane sheet has extensive re-processing capacity; after being heat-sealed and thickened, the membrane sheet is stretched and thinned, so that the film sheet has the performances of a blow-molding material and a flow casting material, and can be used as a packaging box back seal strip on a high-speed packaging body production line. Besides, the invention further discloses a manufacturing method for the online double-layer composite plastic blow-molding film sheet.

The invention relates to a biodegradable thin-film material strengthened by plant fibers and a preparation method thereof. Raw materials and parts by weight thereof used are as follows: 20 parts to 45 parts of plant fibers, 30 parts to 50 parts of starch, 20 parts to 35 parts of vinyl monomers, 20 parts to 30 parts of biodegradable plastics, 10 parts to 15 parts of plasticizers, 3 parts to 5 parts of water and 0.5 part to 3 parts of heat stabilizers. The preparation method of the thin-film material comprises the steps: the plant fibers, starch, vinyl monomers and water of certain quantities are evenly mixed and radiated by a cobalt Gamma 60 source or an electron accelerator for 0.5kGy to 20kGy; the material after radiation is mixed with the biodegradable plastics, the plasticizers and the heat stabilizers; then a twin screw is used for preparing a thin-film special material; and finally the thin-film is formed by means of blow molding using a single screw. The completely biodegradable thin-film has good water resistance and heat combination performance and is applicable to producing farming terra films and packing films so as to solve the white pollution problem caused by the heavy use of oil-based plastic.

The invention discloses an air exhaust and sealing device for a wire and cable material packaging bag, and belongs to the technical field of packaging machinery for plastic particles for wires and cables. The air exhaust and sealing device comprises a box body, an air exhaust mechanism, a bag opening heat-sealing mechanism and a packaging bag supporting mechanism, wherein a box body cavity is formed in the box body; an electrical operation control box is arranged at the top of the box body; the air exhaust mechanism is arranged at the upper part of the front side of the box body; the bag opening heat-sealing mechanism is arranged at a position, corresponding to the lower side of the air exhaust mechanism, on the front side of the box body; the packaging bag supporting mechanism is positioned at a position corresponding to the lower side of the bag opening heat-sealing mechanism and is supported on a terrace of a use place along with the box body; the air exhaust mechanism and the bag opening heat-sealing mechanism are connected with the electrical operation control box in an electrical control manner. According to the air exhaust and sealing device, the sealing efficiency is improved, and the packaging requirement on wire and cable materials for industrial enlargement production is met; the labor intensity is alleviated; the packaging bag can be sealed under the vertical state.

The invention relates to the technical field of aramid fibers and in particular relates to a preparation method of an aramid fiber filter bag and the aramid fiber filter bag. According to the method, aramid fibers are used as fiber raw materials, and are sewed through a heat sealing process; a sewed part is coated with a silane coupling agent solution and the aramid fibers are aramid fibers 1313. With the adoption of the preparation method of the aramid fiber filter bag, provided by the invention, the problems that the surfaces of existing aramid fibers are inert, the bonding between the fibers is relatively weak at a room temperature, the fibers are directly carbonized and decomposed when the temperature is more than 400 DEG C and the like are solved, and the aramid fiber filter bag with strong power and high filtering precision is obtained.

The invention discloses heat-sealable silicone rubber elastomer film, comprising a silicone rubber film layer, a polysiloxane copolymer layer and a polyester elastomer film base. The polysiloxane copolymer layer is applied to the surface of the polyester elastomer film base. The silicone rubber film layer is attached to the polysiloxane copolymer layer. The invention also discloses production equipment and preparation method of the heat-sealable silicone rubber elastomer film. The advantages of polyurethane elastomer and the advantages of organosilicon rubber are integrated herein; a vulcanized silicone rubber compound and the polysiloxane copolymer layer are applied to the polyester elastomer film base to form the heat-sealable organosilicon elastomer in organosilicon block copolymerization manner; the defects of single polymer film components in terms of performance are eliminated; a polymer alloy with complementary integrated properties is attained.

The invention discloses an automatic weighing, sealing and seaming device for a wire and cable material, and belongs to the technical field of packaging machinery for plastic particles for the wires and cables. The automatic weighing, sealing and seaming device comprises a weighing device supported on the terrace under a used state, a sealing device, a seaming device and a packaging bag supporting device, and is characterized in that the weighing device, the sealing device and the seaming device are arrayed on the same straight line in an arranging manner of left to right; the packaging bag supporting device is supported on a terrace of the use place at the position simultaneously corresponding to the lower parts of the front sides of weighing device, the sealing device and the seaming device. The automatic weighing, sealing and seaming device achieves a good coherence effect; the space is saved, and the adaptability to a packaging place is improved; the labor investment is reduced; furthermore, the sealing efficiency is improved; the labor intensity of an on-line worker is relieved, and the labor cost is reduced so as to save precious labor resources; the sealing quality is guaranteed; the packaging bag can be sealed under a vertical state; the automatic weighing, sealing and seaming device has an effect of preventing the wire and cable material in the bag from leaking from the bag opening.

The invention discloses a heating structure of a sealing machine, which comprises a heating body and joints, wherein the joints are connected to both ends of the heating body; the heating body comprises at least one heating strip; and the heating strip comprises a plurality of high-resistance blocks made of high-resistance electric heating wires. The heating structure of a sealing machine can be directly operated in a high-voltage value; the sealing machine using the heating structure can omit a transformer device, the volume and the weight of the sealing machine can be reduced, the structure is simpler, and the use and the carrying are more convenient; and specially, when the heating structure contains a plurality of heating strips, the heating and sealing effect is better, and the appearance is more attractive.

The invention provides a heat sealing mechanism of a band and film heat sealing molding device and belongs to the technical field of machinery, aiming at solving the problem that the heat sealing effect on a thin film and a film pressing band of an existing heat sealing mechanism is poor. The heat sealing mechanism of the band and film heat sealing molding device comprises a mounting base, two groups of driving roller sets and two heat sealing tool bits; each driving roller in each group of driving roller set is rotatably connected onto the mounting base and is connected through a driving belt made of a high-temperature-resisting heat-conducting material; the driving belts on the two groups of driving roller sets penetrate through the two heat sealing tool bits; each heat sealing tool bit is connected with a driving source I; each heat sealing tool bit is further connected with an adjusting assembly I; after adjustment, the driving sources I can drive the heat sealing tool bits to get close to the corresponding driving belts or form a gap with the corresponding driving belts. By adopting the heat sealing mechanism provided by the invention, the thin film and the film pressing band can be enabled to keep a straight state and are fitted relatively well; the heat sealing between an ultra-wide type greenhouse thin film and the film pressing band can be realized and the heat sealing effect is improved.

The invention discloses a highly-filled high-light-transmittance biodegradable air bubble film and a preparation method thereof. The highly-filled high-light-transmittance biodegradable air bubble film is prepared from the following raw materials in parts by weight: 45-70 parts of PBAT, 4-12 parts of polylactic acid, 3-8 parts of polycaprolactone, 20-40 parts of inorganic filler, 0.5-2 parts of plasticizer, 0.2-1 part of antioxidant and 0.2-1 part of chain extender. The preparation method comprises the following steps: S1, carrying out vacuum drying on the PBAT, the polylactic acid, the polycaprolactone and the inorganic filler; s2, weighing the dried PBAT, polylactic acid, polycaprolactone and an inorganic filler, weighing a plasticizer, an antioxidant and a chain extender according to a ratio, and carrying out high-speed mixing in a high-speed mixer; s3, blending, extruding and granulating to obtain blended granules; and S4, putting the obtained blended granules into an air bubble film casting machine, and extruding to obtain the high-filling and high-light-transmission biodegradable air bubble film. High heat sealing strength can still be kept under the condition that high filling is added, the produced air bubble film is not prone to air leakage, and the air bubble film can be composted and degraded after being used up and is a novel environment-friendly material.

The invention discloses a rolling type film heat sealing machine which comprises a feeding roll and further comprises a heat sealing roll assembly. The heat sealing roller assembly is used for conducting heat sealing on a film fed by the feeding roll. The heat sealing roll assembly comprises a first traction roll, a second traction roll and a heat sealing roll arranged between the first traction roll and the second traction roll. The first traction roll and the second traction roll are arranged in parallel. The heat sealing roll is driven by a transmission mechanism to rotate and is further provided with an electric resistance wire. The electric resistance wire extends to the other end of the heat sealing roll from one end of the heat sealing roll to be connected with an external power source. The rolling type film heat sealing machine has the beneficial effects that the maintenance rate is low, the heat sealing stability is good, noise is small and a manufactured film bag is convenient to carry and easy to open.

A medical stone toughened polyvinyl alcohol film for preservation of fruits and vegetables is characterized by being prepared from raw materials as follows: camellia seeds, mint leaves, dried ginger, folium artemisiae argyi, clove flowers, acetone, anhydrous sodium sulfate, medical stone, whey protein, propylene glycol, agaric polysaccharide, corn starch, caustic soda, vinyl acetate, polyvinyl alcohol, an ammonium persulfate solution, hydroxyethyl acrylate, glyceryl monooleate, glycerin and a proper amount of deionized water. The medical stone toughened polyvinyl alcohol film for preservation of fruits and vegetables has good mechanical performance, is stable in structure and good in air permeability, also has a good antibacterial function, can reduce endogenous metabolism ageing of the fruits and vegetables and rotting caused by exogenous microorganisms, substantially prolongs the preservation time and effectively keeps the quality of the fruits and vegetables.

The invention mainly relates to the technical field of medical products, and discloses a medical environment-friendly easily degradable glove. The glove is prepared from 57-59 parts of modified konjakstarch, 26-28 parts of polyvinyl alcohol, 20-22 parts of polyvinyl chloride resin, 7-9 parts of nanometer zeolite and 11-13 parts of polylactic acid; the medical environment-friendly easily degradable glove is simple in raw materials and convenient to prepare, can be produced in batch, is high in toughness, and can inhibit breeding of pathogenic bacteria in the using process, after using, biodegradation can be promoted, and it is greatly avoided that waste gloves cause white pollution on the environment; the modified konjak starch is firstly added into the polyvinyl alcohol for high-temperature stirring to make the modified konjak starch and the polyvinyl alcohol subjected to comprehensive branch junction, the strength and membrane-forming performance of the modified konjak starch are strengthened, and the glove can be biodegraded.

The invention relates to a tear-resistant polyvinyl alcohol fruit/vegetable preservative film. The invention is characterized in that the preservative film is prepared from the following raw materials: camellia seed, peppermint leaf, evening primrose, Lilac, acetone, anhydrous sodium sulfate, wool, titanium white, sodium dodecylsulfate, trypsinase, hydrogen peroxide, wheat starch, acetic acid, acetic anhydride, lauryl methacrylate, polyvinyl alcohol, citrate, corn starch, zinc stearate and a right amount of deionized water. The tear-resistant polyvinyl alcohol fruit/vegetable preservative film has the advantages of favorable mechanical properties, stable structure and favorable air permeability, has favorable antibacterial actions, and is capable of decelerating the fruit/vegetable deterioration caused by endogenous metabolic aging and exogenous microbes, greatly prolonging the preservation period and effectively keeping the fruit/vegetable quality.

The invention provides a wire stitching device which is of an integral from outer appearance. The wire stitching device is integrally provided with an accommodating box, a grooved pulley, shaft pins, a manipulator, connecting brackets, switch pillars, spring pieces, fixing rods, a catch, a lock pulley, a spring, a grooved roller shaft, a support shaft and fixing shafts; a power switch and a knob are arranged on the outside of the wire stitching device; the movable manipulator is arranged in the groove of the grooved pulley, and the spring pieces which are fixedly connected are arranged inside the manipulator; each of the spring piece is wrapped with a layer of heating wires from the outside, and the lower end of the spring piece is provided with the switch pillar capable of moving vertically; the switch pillars are hinged with the connecting brackets, and one ends of the connecting brackets are fixed on the outside of the manipulator; the fixing pin shafts are arranged on the contour surface of the grooved pulley, the lock pulley rotating in uniform angle is fixed on the end surface, and the lock pulley and the pressure spring are nested in the grooved roller shaft. The wire stitching device is reasonable in design, convenient in operation, high in security and capable of performing wire stitching, and efficiency and quality in wrapping breakage of wires are improved.