367 results about "Biodegradable plastic" patented technology

The invention discloses a bamboo powder-containing biodegradable plastic for food contact and a preparation method thereof, and relates to the technical field of bio-based materials. The bamboo powder-containing biodegradable plastic for food contact comprises chitosan starch and modified bamboo powder, the chitosan starch is prepared by adding composite chitosan and amino-terminated polyethylene glycol into oxidized corn starch, and the composite chitosan is prepared by grafting chlorogenic acid on the surface of chitosan and then coating succinic anhydride derivatives. The succinic anhydride derivative is prepared from dodecenyl succinic anhydride and 1, 4-butanediamine through a reaction, so that the plastic has the antibacterial property, and meanwhile, the mechanical property is enhanced; the modified bamboo powder is prepared by reacting bamboo powder with a carboxyl-terminated composition, and the carboxyl-terminated composition comprises carboxyl-terminated polylactic acid and carboxyl-terminated polyamide. The toughness of the plastic is enhanced, and the mechanical property of the plastic is further enhanced.

The invention discloses a biodegradable plastic and a preparation method thereof, belongs to the field of bioplastic preparation, and aims to solve the problem that the existing plastic is slow in degradation rate in a marine environment. The biodegradable plastic is prepared from the following components in percentage by weight: 50-80% of a biomass-based high polymer material; 10 to 35% of a degradable toughening agent; 1-5% of a photosensitizer; 2-10% of a microbial inducer; 1-5% of a processing aid; after the biomass degradable plastic is subjected to ultraviolet radiation for 7-15 days in a marine environment, initial cracks with the density being larger than or equal to 20 pieces / cm < 2 > appear on the surface, the initial cracks are broken into degradation units with the particle size being 5-20 mm after being subjected to mechanical impact of sea waves for 30-60 days, and the biological decomposition rate of the degradation units is larger than or equal to 90% within 6-12 months under the action of marine microorganisms; and no micro-plastic particles with the particle size of less than or equal to 1mm exist in the residual product. Through the synergistic effect of the photosensitizer and the microbial inducer, the degradation period in the marine environment is shortened, the degradation efficiency is improved, and the method is remarkably superior to the prior art.

The invention discloses a compound yeast agent for anaerobic degradation of biodegradable plastics. The compound yeast agent comprises the following components in percentage by mass: 0.5-3% of fenpropathrin, 1-6% of nitrite, 1-4% of ammonium molybdate, 5-10% of PLA, 5-10% of nano starch, 3-6% of nano calcium carbonate, 1-5% of carbamide and the balance of a biodegradable resin carrier. The production method comprises the following steps: 1, dispersion treatment; 2, centralization processing; 3, carrying out structured treatment; 4, carrying out carrier implantation treatment; and 5, plasticizing and granulating. The compound yeast agent is added into the plastic, and the addition amount is 1-5%, so that the anaerobic degradation plastic is formed. According to the invention, anaerobic degradation can be regulated and controlled, and more importantly, anaerobic degradation also realizes that the degradable plastic disclosed by the invention is in a normal use condition, the plastic cannot be degraded quickly in light and oxygen environments, the aging property of the plastic is equivalent to that of a resin matrix of the plastic, and the physical and mechanical properties are ensured.

The invention relates to the field of plastic bags, and discloses a biodegradable plastic bag and a preparation method thereof, the biodegradable plastic bag comprises polylactic acid, poly (butylene adipate-co-terephthalate), a functional additive, modified starch, a lubricant and an antioxidant; the functional additive is prepared by grafting hydroxylated modified castor oil and isocyanated montmorillonite loaded titanium dioxide; the hydroxylation modified castor oil is prepared by modifying castor oil with chloroethyl isocyanate, then reacting with N-allylimidazole, and then reacting with 6-mercaptohexyl-1-alcohol; the isocyanated montmorillonite loaded titanium dioxide is prepared by reacting montmorillonite loaded titanium dioxide obtained by a sol-gel method with isophorone diisocyanate; the modified starch is prepared by reacting octadecanoyl chloride and acryloyl chloride with starch, then carrying out graft copolymerization with ethyl acrylate and further introducing glycidyl methacrylate, so that the plastic bag is endowed with excellent mechanical properties, biodegradability and antibacterial property.

The invention provides a talcum powder-wollastonite master batch and a preparation method thereof, and belongs to the technical field of preparation of master batches for biodegradable plastics. Modified talcum powder, modified wollastonite powder, polylactic acid, an antioxidant, stearic acid and a lubricant are used as raw materials, a talcum powder and wollastonite processing production line and master batch production equipment are combined for use, and a master batch finished product is directly produced from talcum powder and wollastonite raw ore in a one-stop mode. The talcum powder-wollastonite master batch disclosed by the invention has excellent mechanical properties, and the preparation method of the talcum powder-wollastonite master batch reduces dust pollution in intermediate powder packaging and powder transportation, loading and unloading processes, and saves process energy consumption.

A fully recyclable container and a method of manufacturing the same is provided. The container includes a cap, a shoulder, a body, a base, and a liner. The cap, the shoulder, and the base are made of biodegradable plastic by injection molding while the body is made of waterproof paper. The cap, the shoulder, and the base are detachably connected to form a housing of the container. The liner is formed inside the housing by blow molding of biodegradable plastic. The respective components of the container are completely made of biodegradable or bio-decomposable material and able to be disassembled for sorting and recycling. Thereby the fully recyclable container completely meets requirements of environmental protection and recycling.

The invention relates to a preparation method and application of a polyamide surface functionalized polyvinyl alcohol fiber, and belongs to the technical field of biodegradable fibers. According to the method, polyamide is grafted to polyvinyl alcohol fibers through a two-step method. The preparation method comprises the following steps: grafting carboxyl onto the surface of the polyvinyl alcohol fiber through succinic anhydride grafting modification, and further grafting 5-aminoisophthalic acid onto the surface of the polyvinyl alcohol fiber through amidation reaction. The polyamide surface-functionalized polyvinyl alcohol fiber prepared by the method has excellent performance, and the maximum pull-out load and the corresponding pull-out strength of the polyamide surface-functionalized polyvinyl alcohol fiber in a biodegradable plastic film are obviously superior to those of unmodified polyvinyl alcohol fiber or polyvinyl alcohol fiber subjected to surface modification by using succinic anhydride alone; particularly, the maximum pull-out load and the corresponding pull-out strength of the modified fiber in the biodegradable plastic film after the modified fiber reacts at 40 DEG C for 1.5 h reach the maximum value, and the whole biodegradable plastic after fiber reinforcement still keeps the biodegradable performance. As a method for regulating and controlling the interface bonding force between the polyvinyl alcohol fiber and a biodegradable plastic matrix, the method is expected to be applied to preparation of biodegradable efficient reinforced fiber, and the application prospect of the polyvinyl alcohol fiber is improved.

The invention relates to the technical field of organic solid waste resourceful treatment, in particular to a method for enhancing degradation of biodegradable plastic compost based on white-rot fungi and manganese modified charcoal. According to the method, manganese modified charcoal and white-rot fungi are subjected to synergistic treatment, and the efficient method for intensively degrading the biodegradable plastic through aerobic composting is constructed. The method effectively overcomes the technical bottlenecks of slow degradation starting, long degradation period and easy generation of micro-plastic residues of the biodegradable plastic in traditional compost, and realizes rapid and thorough degradation of the biodegradable plastic. Besides, the method also promotes the conversion of humus precursor substances in the compost material and accelerates and stabilizes the synthesis of humus, so that the decomposition degree of the compost product is remarkably improved, and the quality and environmental safety of the final compost product are synchronously improved while the biodegradable plastic is efficiently degraded. And an efficient and reliable solution is provided for recycling of organic solid wastes and degradation of biodegradable plastic compost.

The invention discloses a bamboo powder reinforced and replaced biodegradable plastic and a preparation method thereof, and belongs to the technical field of biodegradable plastics. Comprising the following raw materials in parts by weight: 10-20 parts of modified bamboo powder, 45-55 parts of PBAT resin, 30-40 parts of polylactic acid, 3-5 parts of modified humic acid filler, 5-8 parts of epoxidized soybean oil, 0.3-0.5 part of an antioxidant, 0.3-0.6 part of a light stabilizer, 4-6 parts of a compatilizer and 0.3-0.5 part of an epoxy chain extender. According to the bamboo powder reinforced and replaced biodegradable plastic and the preparation method thereof, the modified bamboo powder and the humic acid filler are compounded with the PBAT, the polylactic acid and other raw materials, so that the cost is reduced and the environmental protection property is improved by utilizing the bamboo powder, the humic acid and other renewable resources, and the compatibility with a matrix is enhanced through modification; the antioxidant, the light stabilizer and the like are matched, so that the mechanical property is improved, and multiple advantages of low cost, high performance and degradability are realized.

The invention discloses a simple preparation method of a high-starch-content, high-strength and low-cost biological polyester film bag material, and belongs to the field of biodegradable high-molecular materials. PBAT, high-molecular-weight polylactic acid, starch, a compatible modifier, a biological chain extender and an antioxidant are put into a mixing mill to be mixed at a high speed, and pre-dispersed mixed granules are obtained; the preparation method comprises the following steps: adding the raw materials into an internal mixing and extrusion integrated reverse twin-screw extruder, firstly melting and internal mixing for in-situ reaction, then starting extrusion, cooling the extruded material by air cooling, then cutting and collecting granules, and taking an amphiphilic block copolymer polypropylene glycol-polyethylene glycol-polypropylene glycol (PPG) as a modifier, the use amount of polylactic acid is small, the starch content is high, plasticizing is not needed, the components are easy to obtain, the multi-phase interface permeation adhesion is high, the system is uniform, the method is simple, and the cost is low; the biodegradable plastic has the advantages of toughness of PBAT, strength of PLA, low price of starch and compatibilization and reinforcement of amphiphilic blocks, and is suitable for processing of biodegradable film bags, dustproof nets, plastic parts and other bioplastic products.

An environmentally friendly fresh-keeping can and a method of manufacturing the same are provided. The environmentally friendly fresh-keeping can includes a housing, an inner container, an easy-open lid, and a bottom cover. The housing, the inner container, the easy-open lid, and the bottom cover are respectively made of a spiral paper tube, bio-based polyethylene 2,5-furanoate (PEF), aluminum, and biodegradable plastic. The inner container is mounted into the housing through an inner opening on a top of the inner container. Then the easy-open lid and the bottom cover are respectively used to seal the inner opening of the inner container and a bottom opening of the housing. The respective components are made of biodegradable, recyclable and reusable materials and able to be disassembled for recycling and reuse. Thereby the can meets requirements for environmental protection and recycling.

The present invention relates to a hot-melt adhesive composition comprising a biodegradable plastic, a thermoplastic polymer, a tackifier and a plasticizer, wherein the biodegradable plastic includes polyhydroxyalkanoate (PHA). The hot-melt adhesive composition according to the present invention has lower viscosity and higher adhesiveness compared to a petroleum-based hot-melt composition, and can be used as an eco-friendly hot-melt adhesive composition having physical properties corresponding to an excellent recycling criteria grade under recyclability assessment criteria.

The invention discloses a micro-plastic degrading bacterium P.ataveovii and application thereof, and belongs to the technical field of microorganisms. According to the invention, a strain of Priestia aryabhattai BK12 is separated and screened from plastic wastes, and the plastic degradation capability of the Priestia aryabhattai BK12 is deeply explored. A research result shows that the P.avenae BK12 can be used for efficiently degrading the PET (Polyethylene Terephthalate), and the P.avenae BK12 can be used for efficiently degrading the PET (Polyethylene Terephthalate), so that the P.avenae BK12 can be used for efficiently degrading the PET (Polyethylene Terephthalate). The invention provides a new microbial resource for the development of a plastic degradation agent, contributes to promoting the development of a biodegradable plastic technology and solving the problem of environmental pollution caused by PET, and assists in realizing the goal of green and sustainable development.

The invention provides a container capable of being completely recycled and a manufacturing method thereof. The container structurally comprises a bottle cap, a bottle shoulder, a bottle body, a bottle bottom and an inner container. The bottle cap, the bottle shoulder and the bottle bottom are made of biodegradable plastic and are manufactured through an injection molding technology; the bottle body is made of waterproof paper; the bottle cap, the bottle shoulder, the bottle body and the bottle bottom are detachably combined to form a shell structure of the container, and the inner container is formed in the shell structure through biodegradable plastics in a blow molding mode. All parts of the container capable of being completely recycled are made of biodegradable or degradable materials, and all the parts can be disassembled, classified and recycled, so that the requirements of environmental protection and recycling are completely met.

The utility model discloses an automatic feeding device for producing full biodegradable plastic bags, which comprises a side plate, the lower end of the side plate is connected with a bottom plate, one side of the bottom plate is connected with a first motor, one end of the first motor is connected with a connecting rod, the surface of the connecting rod is connected with a feeding roller, and the other side of the side plate is connected with a conveying frame. A second motor is connected to one end of the conveying frame, a conveying rod is connected to one end of the second motor, a conveying belt is connected to the surface of the conveying rod, a supporting seat is connected to the upper end of the conveying belt, a fixing groove is formed in the supporting seat, a movable block is connected to the interior of the fixing groove, a protruding block is connected to one end of the movable block, and a connecting block is connected to the upper end of the movable block; according to the automatic feeding device for producing the full-biodegradable plastic bags, due to the arrangement of the device, plastic bag films can be effectively and rapidly fed, manpower is saved, the working efficiency is improved, and therefore the problems and defects of an existing device are effectively solved.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).　The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.

The invention discloses a one-way moisture-conducting biodegradable non-woven fabric and a preparation method thereof. A hydrazide compound is grafted to lignin through an acylation reaction, the lignin nanoparticle nucleating agent is prepared through a nano precipitation method, the crystallization behavior of biodegradable resin is changed through lignin nanoparticles, the crystallization rate is increased, the cooling forming period is shortened, and therefore the spinnability of the biodegradable resin is improved. Furthermore, the surface of the biodegradable non-woven fabric is subjected to hydrophilic and hydrophobic modification through a low-temperature plasma technology, and the biodegradable non-woven fabric with the one-way moisture guiding function is prepared. The problem that biodegradable plastics such as PBAT and PBS are poor in spinnability is solved, the bio-based nucleating agent is prepared to replace a traditional small-molecule organic nucleating agent, the problems that the traditional organic nucleating agent is difficult to biodegrade and easy to separate out are solved, and the prepared one-way moisture-conducting biodegradable non-woven fabric has good directional infusion performance and is suitable for being used as a non-woven fabric. The fabric can be widely applied to the fields such as sanitary napkins, paper diapers, masks and shoes.

To provide a new microorganism capable of decomposing biodegradable plastic, especially polylactic acid (PLA) or polybutylene adipate terephthalate (PBAT).SOLUTION: The microorganism according to the present disclosure belongs to the family Bacillaceae, and has been deposited under Accession No. NITE BP-04083.SELECTED DRAWING: Figure 3

The invention relates to the technical field of degradable plastics, in particular to a preparation process of a PET polyester degradable plastic sheet. The PET polyester degradable plastic sheet is prepared from the following raw materials in parts by mass: 80 to 140 parts of PET resin, 10 to 30 parts of PBAT resin, 5 to 15 parts of polylactic acid, 5 to 15 parts of degradation aid, 10 to 30 parts of inorganic filler, 1 to 3 parts of graphene oxide, 1 to 2 parts of zinc nitrate, 0.1 to 1 part of 2-methylimidazole, 1 to 3 parts of antioxidant, 10 to 20 parts of flame retardant, 1 to 3 parts of stabilizer and 1 to 2 parts of lubricant. The flame-retardant anti-dripping PET material has the advantages that the flame-retardant anti-dripping effect of the PET material can be obviously improved, the good mechanical property is kept, the biodegradability is obvious, and the market benefit and the social benefit are wide.

The invention relates to a preparation process of a modified PPC biodegradable plastic, and belongs to the technical field of bioplastics, the modified PPC biodegradable plastic comprises the following raw materials: 60-80 parts of PPC resin, 20-30 parts of a modified reinforcing material, 0.5-1 part of an antioxidant, 0.4-0.6 part of a plasticizer and 0.5-0.8 part of a lubricant; according to the technical scheme, after cellulose is grafted with amino silane, the amino silane is combined with the aldehyde group compound to obtain the reinforcing material, and the amino silane is combined with the aldehyde group compound to form a Schiff base structure; combining epoxidized castor oil with a reinforcing material to obtain a modified reinforcing material; the modified PPC biodegradable plastic is obtained by mixing the PPC resin, the modified reinforcing material, the antioxidant, the plasticizer and the lubricant, carrying out melt blending and then carrying out extrusion granulation, so that the thermal property, the mechanical property and the flame retardant property of the PPC biodegradable plastic are totally improved, the comprehensive performance of the PPC biodegradable plastic is improved, and the pollution to the environment is reduced.

The invention discloses a full-biodegradable mulching film capable of relieving microplastic release harm. The full-biodegradable mulching film is prepared from the following components in parts by weight: 100 to 150 parts of poly (butylene adipate-co-terephthalate); 0.5 to 1.5 parts of an ultraviolet light absorber; 0.5 to 0.6 part of an antioxidant; 0.5 to 0.6 part of a lubricant; and 2-8 parts of modified charcoal. The method comprises the following steps: pretreating biochar with a KOH solution to obtain pretreated biochar; adding the pretreated biochar into a glacial acetic acid solution of chitosan oligosaccharide, stirring at room temperature, dropwise adding a sodium citrate solution, standing at low temperature, centrifuging, washing, and drying in vacuum to obtain chitosan oligosaccharide grafted biochar; and adding the chitosan oligosaccharide grafted biochar into carbon black, and mixing to obtain the modified biochar. The modified biochar prepared by the method can replace carbon black to prepare a full-biodegradable mulching film with higher strength and water vapor permeability; after the mulching film is degraded, the biochar adsorbs the degraded micro-plastics, so that the damage of the micro-plastics to crops is reduced.

The invention encompasses biodegradable compositions (e.g., biodegradable plastics) and methods of preparation and use thereof, and disposable products made from the claimed compositions. Raw materials for preparing the biodegradable plastic include one or more polymers, fiber, starch, a plasticizer, and a coupling agent. The biodegradable composition has the advantages of short degradation cycle, good mechanical properties, and a low manufacturing cost.

The invention provides a preparation method of sealing aging resistant PBAT resin, biodegradable plastic and application, and the preparation method comprises the following steps: mixing adipic acid, butanediol and a first catalyst, and carrying out a first esterification reaction to obtain a first intermediate product; mixing terephthalic acid, m-phenylenediacetic acid, butanediol and a second catalyst, and carrying out a second esterification reaction to obtain a second intermediate product; performing a pre-polycondensation reaction on the first intermediate product, the second intermediate product and a pre-polycondensation catalyst in a polymerization reaction kettle to obtain a pre-polycondensation product; and carrying out final polycondensation on the pre-polycondensation product to obtain the sealing aging resistant PBAT resin. The edge sealing bag prepared from the sealing aging-resistant PBAT resin provided by the invention has more excellent sealing performance, and the sealing aging-resistant performance of the edge sealing bag is better.

The invention relates to the field of high polymer materials, and particularly discloses a starch modified biodegradable plastic bag and a preparation method thereof. The starch modified biodegradable plastic bag is prepared from the following raw materials in parts by weight: 3 to 6 parts of PLA (polylactic acid) resin, 3 to 5 parts of talcum powder, 20 to 25 parts of starch, 60 to 65 parts of PBAT (poly (butylene adipate-co-terephthalate)) resin, 0.3 to 0.5 part of polyethylene wax, 0.2 to 0.4 part of erucyl amide, 2 to 4 parts of glycerol, 3.5 to 5 parts of water and 0.2 to 0.5 part of antioxidant. The plastic bag has the advantages of being good in starch dispersity, not prone to generating crystal points, high in surface quality, large in tensile strength and excellent in barrier property.

The invention relates to the technical field of degradable plastics, and particularly discloses a starch-based biodegradable plastic and a preparation method thereof.The preparation method includes the steps that high-amylose starch (such as corn, potatoes and cassava) is selected as a raw material and cleaned, dried and ground to obtain starch powder, a natural plasticizer (such as glycerin) is added to improve the flexibility, and the starch-based biodegradable plastic is obtained; a chemical cross-linking agent (such as glutaraldehyde) is used for enhancing the strength and the heat stability, an antioxidant (such as vitamin E) and an antibacterial agent (such as tea polyphenol) are used as additives, and the mass ratio of the antioxidant to the antibacterial agent is (0.6-0.85): (0.05-0.2): (0.005-0.03): (0.001-0.01): (0.001-0.005). The starch-based bioplastic prepared by the invention has good degradation performance and adjustability, is particularly suitable for the fields of disposable packaging, agricultural films, medical materials and the like, has a natural antibacterial function and ultraviolet protection capability, has huge application potential in the fields of medical treatment, food packaging and environmental protection, and has wide application prospects. The advantages of the starch-based plastic in agricultural application are also realized.

The invention discloses a marine land full-natural-domain biodegradable plastic and a method for preparing the biodegradable plastic, and relates to the technical field of biodegradable plastics. Polyhydroxyalkanoate, polylactic acid and poly (butylene succinate) are used as main matrixes of the material, modified alginate gel is innovatively introduced, and the biodegradable plastic is prepared. The gel has photo-thermal and ionic characteristics, and under the condition of land illumination, the photo-thermal effect of the quantum dots triggers the gel to shrink and release lipase to accelerate hydrolysis; in a marine environment, sodium ion replacement promotes gel to be disintegrated and continuously releases enzyme molecules, the gel, matrix resin, natural fibers and a plasticizer are subjected to twin-screw melt blending extrusion, and the biodegradable plastic is prepared. The technical problems of response lag, insufficient enzyme activity protection and low degradation efficiency of traditional biodegradable plastics in a complex natural environment are effectively solved, and self-adaptive efficient degradation in sea and land environments is realized.

The invention discloses a probiotic agent for anaerobic biodegradable plastics, a preparation method of the probiotic agent and biodegradable plastics, the probiotic agent takes PBAT as a carrier material and nano starch, PLA, nano calcium carbonate, carbamide and nano fumed silica as probiotic materials, and probiotic particles are formed through multiple mixing and plasticizing granulation. According to the invention, anaerobic degradation can be regulated and controlled. More importantly, anaerobic degradation also realizes normal use of the degradable plastic, the plastic cannot accelerate degradation in light and oxygen environments, the aging property of the plastic is equivalent to that of a resin matrix of the plastic, and the physical and mechanical properties are ensured.

The invention discloses a biodegradable sewage treatment filler as well as a preparation method and application thereof, and belongs to the technical field of biological sewage treatment, the novel sewage treatment filler is prepared from biodegradable plastics PCL and TPS, the rapid degradation and denitrification nitrogen removal performance of a biodegradable material in the sewage treatment denitrification process is enhanced, and the biodegradable sewage treatment filler belongs to the technical field of biological sewage treatment. Due to the small contact surface between the filler and the bottom and sufficient disturbance, various pollutant degrading microorganisms, PCL efficient degrading microorganisms and the like can be more effectively gathered in a biological treatment reaction tank of a sewage treatment plant, so that efficient utilization of biodegradable materials and a low-carbon denitrification process of sewage microbiological treatment are realized; meanwhile, the filler is used as a slow-release carbon source, so that the rapid carbon source adding amount of a sewage treatment plant is effectively reduced, the cell yield is relatively low, and the effects of reducing sludge, reducing the operation and maintenance cost and the like can be achieved. In addition, PCL is decomposed faster in a sewage treatment system than in a natural habitat, and the natural degradation process of biodegradable materials can be further accelerated.

The invention discloses a biodegradable plastic tray and a preparation method thereof.The method comprises the steps that S1, appropriate plastic raw materials are selected according to the use requirement of the tray, the plastic raw materials are dried, moisture and volatile matter in the raw materials are removed, the plastic raw materials and an additive are fully stirred and mixed through a stirrer, and a mixture is obtained; and the additive is uniformly dispersed in the plastic raw material. According to the biodegradable plastic tray and the preparation method, different raw materials, equipment and the like are selected according to different tray requirements and design specifications, quality detection is conducted on the tray in the preparation process, and the production quality of the tray is improved; and intelligent monitoring and predictive maintenance of the production equipment are realized through the intelligent monitoring module, so that the failure shutdown time of the equipment is shortened, and the production continuity is improved.

The present disclosure relates to a biodegradable plastic bag composition and a method for manufacturing a plastic bag using the same, wherein the plastic bag composition includes: cellulose acetate propionate (CAP); and polybutylene succinate (PBS), wherein cellulose acetate propionate:polybutylene succinate, which is the weight ratio of the cellulose acetate propionate and the polybutylene succinate, is approximately 75:25 to approximately 90:10.