The invention belongs to the field of biodegradable materials and relates to a flame retardant and anti-static biodegradable material, and a preparation method thereof. The biodegradable material is prepared by the following components by weight: 5-90 parts of a biodegradable resin, 0-10 parts of a reactive agent and 5-90 parts of flame retardant and anti-static starch master batch. By compounding an organic anti-static agent and an inorganic anti-static agent, a durable anti-static property is endowed to the biodegradable material; and dependency of the anti-static property to environment humidity is reduced. Meanwhile, by adding an intumescent flame retardant with the starch as a carbon source, inflammability of the biodegradable material is effectively overcome. The anti-static agent and the intumescent flame retardant are environment-friendly; and excellent mechanical properties and processing properties of the biodegradable material are retained.

Novel flame retardant and anti-static biodegradable material and preparation method thereof

The invention discloses a preparation method of a full biodegradation film, which takes poly adipic acid/polybutylene terephthalate (PBAT) and starch as base materials, poly-epsilon carpolaction (PCL), epoxidized soybean oil (ESO), and phosphorous acid dialkyl ester as plasticizers, and montmorillonoid or calcium carbonate, talcum powder and the like as inorganic fillers. The method comprises the steps that modification and pelleting are performed in a twin screw; modified resin is added to a film blowing machine for film blowing; and the full biodegradation film can be obtained finally. The full biodegradation film produced by the method is better in physical characteristic, can be directly prepared into a film bag, and can serve as a daily-used packaging film, a waistcoat bag, a food packaging bag and the like; the preparation method of the full biodegradation film is simple in technology, and easy to control, and is suitable for industrial mass production; the film bag produced by the method is high in strength, can be biodegraded fully after use, and is easy to dispose; and environmental pollution is reduced.

Preparation method of full biodegradation film

The present invention discloses a biodegradable polyester composition, wherein based on a total weight of the biodegradable polyester composition, a weight content of glycidyl methacrylate is 0.05 ppm-10 ppm. In the present invention, by adding a trace amount of glycidyl methacrylate into a chosen formula of the biodegradable polyester composition and controlling the weight content of glycidyl methacrylate which finally remains in the biodegradable polyester composition as 0.05 ppm-10 ppm, a compatibility between aliphatic-aromatic polyester and polylactic acid in the biodegradable polyester composition can be greatly enhanced, which enables the biodegradable polyester composition to have excellent surface property of film material, and no fisheye occurs on the film material because of a fluctuation of processing technique.

Biodegradable polyester composition

The invention relates to a full-biodegradable material which is characterized by comprising the following raw materials in percentage by weight: 30-65% of starch, 5-15% of vegetable oil, 15-50% of polylactic acid, 10-20% of polybutylene adipate-polybutylene terephthalate copolymer and 5-30% of compatilizer. Preferably, the compatilizer accounts for 5-20% of the total weight of the raw materials. The full-biodegradable material has the advantages of excellent and stable properties and low cost, is biodegradable, well gives consideration to economic benefit and environmental benefit, and has wide application prospects. The invention also provides a preparation method of the full-biodegradable material. The preparation method is easy to implement, operate and control, can easily implement industrial production, and is beneficial to lowering the cost of the full-biodegradable material.

Full-biodegradable material and preparation method thereof

The invention relates to a composition of a high-tenacity full-biodegradable film and a preparation method thereof The film is prepared from polylactic acid (PLA), poly propylene carbonate (PPC), polybutylene adipate terephthalate (PBAT) and a heat stabilizer Blending modification sections are prepared by adopting a twin-screw extruder, blow molding is carried out by adopting a single-screw extruder, the prepared film has excellent tenacity and full biodegradable performance, and meanwhile the cost is low, so that the film is an ideal substitute for a current non-degradable film packing material

Full-biodegradable film and preparation method thereof

The invention discloses a biodegradable barrier thin film, as well as a preparation method and application thereof. The biodegradable barrier thin film is prepared from 0-80% of biodegradable homopolyester, 0-80% of biodegradable copolyester, 1-30% of ethylene-vinyl alcohol copolymer and 0-5% of additives. The biodegradable barrier thin film disclosed by the invention is formed by mixing the biodegradable homopolyester with higher biodegradation speed, the biodegradable copolyester with better processing performance and the ethylene-vinyl alcohol copolymer with good barrier property according to different proportions, and the thin film prepared from an obtained composition has biodegradability and barrier property, and can be widely applied to the packaging field, in particular to the food and medicine packaging field.

Biodegradable barrier thin film, as well as preparation method and application thereof

The invention discloses a filling masterbatch used in biodegradable plastic. The masterbatch is composed of components of, by mass: (A) 20.0-80.0% of biodegradable polyester, (B) 1.0-80.0% of a filling material, (C) 0.1-10.0% of a lubricating agent, (D) 0.1-5.0% of a high-temperature-resistant agent, and (E) 0.1-5.0% of a hydrolysis-resisting agent. The masterbatch is advantaged in that: (1) compatibility of the carrier is consistent with that of the biodegradable plastic, such that the filling masterbatch has excellent dispersity in the biodegradable plastic; (2) the obtained filling masterbatch satisfies an application requirement of biodegradable plastic En13432; when the filling masterbatch is mixed with biodegradable plastic, the biodegradation performance of the original material is completely maintained; (3) high temperature and hydrolysis resistances of the filling masterbatch are good, and the filling masterbatch has high physical mechanical properties; (4) with the filling masterbatch, while the cost of biodegradable plastic is reduced, physical chemical properties especially the biodegradation performance of the filled material are maintained.

Filling masterbatch used in biodegradable plastic, and preparation method thereof

The invention discloses a method for preparing polyester-polyester blocked copolyester, which comprises the following steps: (1) synthesizing an aromatic polyester hard segment to obtain a prepolymer P1 with a number-average molecular weight in the range of 500-10,000g/mol; (2) synthesizing an aliphatic polyester soft segment to obtain a prepolymer P2, wherein the prepolymer P2 can also be obtained by ring-opening polymerization of caprolactone monomer, and the number-average molecular weight of the prepolymer P2 is in the range of 500-10,000g/mol; (3) carrying out polycondensation reaction of the aromatic polyester oligomer and the aliphatic polyester oligomer: mixing the esterified product P1 and the esterified product P2, adding antioxidant, catalyst, passsivator and chain expander, allowing reaction at 220-260 DEG C to obtain a polyester-polyester block polyester elastomer. The catalysts used in the steps (1) and (2) are selected from titanium-containing organic substances. The method disclosed by the invention has the following advantages: (1) because the aliphatic polyester soft segment is introduced, the product has both the mechanical properties of the rigid aromatic polyester hard segment and the flexibility of the soft segment; and (2) because a number of assistants are added, the good chain expansion effect is achieved, and the reaction conditions are controlled.

Method for preparing polyester-polyester blocked copolyester

The invention discloses a full-biodegradable composite as well as a preparation method and application of the full-biodegradable composite. The full-biodegradable composite comprises the following components: 5-40 parts of inorganic filler full-biodegradable masterbatches, 40-80 parts of biodegradable copolyester, 10-40 parts of polylactic acid and 0.1-5 parts of a compatilizer, wherein the inorganic filler full-biodegradable masterbatches comprise the following components: 20-80 parts of the biodegradable copolyester, 20-80 parts of inorganic filler, 0.1-10 parts of a lubricating agent and 0.1-5 parts of the compatilizer; and the inorganic filler is one or a combination of modified kaolin, modified white carbon black and modified montmorillonite. According to the full-biodegradable composite, the modified montmorillonite, the modified kaolin or the modified white carbon black is added as an enhancer, and an epoxy acrylic copolymer is introduced as the compatilizer, so that the compatibility of inorganic filler and matrix resin is enhanced, and the uniform dispersion is achieved; and the masterbatches are added into the matrix resin, so that the problem of relatively low tearing strength of a blend film and a sheet can be effectively improved.

Full-biodegradable composite as well as preparation method and application of full-biodegradable composite

The invention discloses a starch-containing biodegradable barrier-property film as well as a preparation method and an application thereof. The biodegradation barrier-property film is prepared from the following components in percentage by weight: 0-80% of biodegradable homopolyester, 0.80% of biodegradable copolyester, 1-30% of ethylene-vinyl alcohol copolymer, 5-60% of starch and 2-30% of polyhydric alcohol. According to the starch-containing biodegradable barrier-property film as well as the preparation method and the application thereof, the biodegradable homopolyester having a faster biodegradation speed, the biodegradable copolyester having better processing performances and the ethylene-vinyl alcohol copolymer having good barrier property are adopted and blended according to different proportions, and the film prepared from obtained composition not only has biological degradability, but also has the barrier property, can be widely applied to the packaging fields and particularly can be widely applied to the packaging fields of foodstuffs and medicines.

Starch-containing biodegradable barrier-property film as well as preparation method and application thereof

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