126results about How to "Solve white pollution" patented technology

The invention discloses a completely-degradable poly (propylene carbonate) composite film material and a preparation method thereof. The composite film material is formed by blending and compounding poly (propylene carbonate) with polylactic acid, wherein the content of the polylactic acid is between 10 and 50 weight percent, and the content of the poly (propylene carbonate) is between 50 and 90 weight percent. The preparation method comprises the following steps that: the poly (propylene carbonate) and the polylactic acid are respectively dissolved in organic solvents and made into solutions; the two solutions are well mixed pro rata and volatilized at room temperature so as to eliminate most of the solvents, and then mixed liquid is cast in a plate glass mold; and after the mixed liquid is vacuum-dried to constant mass, a PPC-PLA composite film material can be obtained. The composite film material provided by the invention obviously improves the properties of the poly (propylene carbonate), effectively solves the increasingly serious white pollution problem, and has important significance for ecological environment protection. The preparation method is simple in process, convenient to operate, easy to realize, low in equipment dependence and little in material consumption.

The present invention belongs to the technological field of the polymer material, provides and relates to a wholly degradable natural fiber and polylactic composite material and the preparation method. The composite material consists of the surface modified natural fiber and the polylactic acid. The specific preparation steps are: first the natural fiber of a certain long diameter is taken and the natural fiber is soaked in the aqueous solution of the coupling agent for 1 to 100 minutes; then the natural fiber is taken out and dried; thus the surface modified natural fiber can be got. Then the polylactic acid is molded and refined in the two-roller smelting machine at a temperature between 100 and 160 Celsius system; after 1 to 20 minutes, the surface modified natural fiber is added to mix and refine. The mixed products are putinto the mold; the mixed products are compressed and molded in the flat vulcanization machine to make the natural fiber and polylactic composite material. Compared with the pure polylactic acid, the mechanical and thermal performances of the composite material are improved; the composite material can be used in the preparation of the engineering plastics with the demanding conditions. The composite material of the present invention can be wholly degraded in the natural environment after being used and wasted, and the composite material belongs to the environmentally friendly material.

A humic acid degradable liquid manure plastic film is characterized in that the components and content proportions by weight are as follows: 55% to 65% of humic acid, 4% to 6% of accelerant, 13% to 17% of stabilizing agent, 13% to 17% of film former, and 4% to 6% of water. The humic acid degradable liquid manure plastic film can reduce more than 30% of groundwater evaporation, the soil moisture content is increased by more than 20%, and the water preserving effect is good; the ground temperature of the soil 30 to 50 mm under ground is increased by 1 to 4 DEG C, the crop growth and development period is 3 to 10 days ahead, and the heat insulation effect is good; the fertility is added, and the content of humic acid in liquid plastic film is greater than 90%; the permeability is added, the soil volume weight is decreased by 6 to 10, the soil granulation amount is greater than 0.25, which is increased by more than 10.

The invention relates to a polylactic acid fresh-keeping film containing natural antibacterial ingredients and a preparation method thereof, is used for solving the problems that a conventional antibacterial fresh-keeping film has complex processing, volatile antibacterial materials have large loss in the processing process and white pollution of a packaging film is serious. A single face or double faces of a modified polylactic acid thin film are coated with an antibacterial coating layer containing a fig branch extract, wherein the modified polylactic acid thin film is prepared by taking polylactic acid resin REVODE110 as a base material, adding nano copper CW-Cu-001 and blowing; the antibacterial coating layer is preapred by adding an acrylic acid-hydroxypropyl acrylate copolymer, hydroxypropyl acrylate and an initiator BP1173 to the fig branch ethyl acetate extract and mixing; the modified polylactic acid thin film is coated with the antibacterial coating layer, then the coated modified polylactic acid thin film is irradiated and cured by an ultraviolet light, and thus the polylactic acid fresh-keeping film is obtained .

The invention discloses a novel durable plastic-wooden composite sheet material, which comprises the following raw materials: VII PVC, wood powder, a polyvinyl chloride reworked material, active calcium, a calcium-zinc stabilizer, polyethylene wax, an internal lubricant, a foam adjusting agent, ACM, MBS, oxidized polyethylene wax, a polyvinyl chloride (PVC) foaming agent, poly-4-methyl-1-pentene, chlorinated polyvinyl chloride, glass fiber and ABS high glue powder. Compared with a traditional plastic-wooden composite sheet material, the novel durable plastic-wooden composite sheet material adds the ABS high glue powder, a MBS impact modifier, glass fiber and the like, thereby the product can reach the usage function, and has toughness, rigidity and elasticity, and the flexural modulus of the product can reach 2000MPA. The novel durable plastic-wooden composite sheet material can fully embody the advanced concepts of sustainable economic development such as circular economy, resource utilization, healthy and environment protection, conservation and substitution and the like, the problem of white pollution caused by waste plastic without treatment, recovery and utilization can be effectively solved, and the novel durable plastic-wooden composite sheet material enables comprehensive utilization of resources and a function of the environment protection.

The invention discloses a high-barrier degradable biaxially oriented film and a preparation method thereof. The film is of a five-layer structure and sequentially comprises an upper surface layer, a first secondary surface layer, a middle layer, a second secondary surface layer and a lower surface layer from top to bottom, wherein the upper surface layer comprises polylactic acid, a compatilizer, functional masterbatch and polybutylene terephthalate / adipate, the first secondary surface layer comprises polycaprolactone, cellulose and starch, the middle layer comprises poly-3-hydroxybutyrate, a compatilizer and a carbon dioxide epoxypropane copolymer, the second secondary surface layer comprises polycaprolactone, cellulose and starch, and the lower surface layer comprises polylactic acid, a compatilizer, functional master batch and polybutylene succinate. The film prepared through the method is good in mechanical property, high in barrier property and completely biodegradable, and the product is suitable for the field of packaging of food, medicine, daily chemical products, medical instruments and the like.

The invention provides a plastic railway sleeper formula process which is low in manufacturing cost, good in elasticity and long in service life. The plastic railway sleeper formula process is characterized in that a plastic railway sleeper formula comprises: 46-60 parts of waste polyvinyl chloride waste wire skin (PVC), 18-25 parts of waste tire rubber powder (WRP), 1-5 parts of fluoroplastic waste wire skin (PTFE), 1-5 parts of polyperfluorinated ethylene propylene waste wire skin (FEP), 1-15 parts of polypropylene waste wire skin (PP), and the like. According to the invention, wastes are utilized as materials, so that not only can product cost be lowered, but also a problem of waste plastic white pollution and waste rubber black pollution is solved to a certain extent, and therefore, environment is protected. Waste rubber is used as the main material to ensure elasticity of the plastic sleeper, so that good buffer action can be achieved well during use. The plastic sleeper produced by the plastic railway sleeper formula process disclosed by the invention is good in environment-friendly effect, long in service life, good in elasticity, good in insulativity, not fractured at -60 DEG C, and good in cold resistance, and therefore, the plastic sleeper is an ideal product for replacing a cement railway.

The invention discloses a lignin-based environment-friendly mulching film forming liquid, a preparation method thereof and a mulching film and belongs to the technical field of lignin development and application. Solute of the mulching film forming liquid is composed of, by weight, 13-18 parts of lignosulfonate, 13-18 parts of PVA, 12-16 parts of epichlorohydrin, 12-16 parts of iron-free aluminum sulfate, 20-25 parts of 40% (w / w) formaldehyde solution, 13-18 parts of urea and 1-2 parts of borax, and solvent of the film forming liquid is water. The mulching film is obtained by spraying the film forming liquid after being diluted on a plane and air-drying. The lignin-based environment-friendly mulching film is good in mechanical performance and waterproofness and can replace existing plastic mulching films to be used in agricultural production. The mulching film has the characteristics of being degradable and usable after being degraded, so that the problems of soil infertility and white pollution caused by using of the plastic mulching films can be solved, and production of crops is facilitated.

The present invention pertains to the art of macromolecular material technology, in particular to a preparation of fully-degradable natural fiber / imvite / polylactic acid composite material. The composite material consists of natural fiber, polylactic acid, imvite, antioxygen and compatilizer. The specific preparation steps include: masterbatch is obtained by fusing and mixing polylatic acid, organic modified imvite, antioxygen and compatilizer according to a certain proportion; then the masterbatch, polylactic acid and natural fiber are mixed and extruded according to a certain proportion; theextruded material is cooled, granulated and dried to obtain the polylactic acid / imvite / natural fiber composite material. Compared with the pure polylactic acid, the composite material with increaseddynamic performance, flame retardant performance and heat performance can be used to manufacture the engineering plastic with the rigorous conditions and requirements. The composite material providedby the present invention can be fully degradated in the natural environment after being abandoned, which pertains to environment-friendly material.