Poly(butyleneadipate-co-terephthalate) (PBAT) resin composition
A resin composition and resin technology, applied in the field of PBAT resin composition, can solve the problems of broken holes, large thickness difference of film material, uneven stress distribution in various parts of film bubble, etc., to ensure continuity and improve blown film characteristics Effect
Inactive Publication Date: 2016-08-10
ZHUHAI WANTONG CHEM +2
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Problems solved by technology
[0003] However, PBAT resin also has the following defects: For example, when the film is blown at a higher speed, the thickness of the film material is very different, and in the blowing process, there will be holes in various parts of the film bubble due to uneven stress distribution, which affects the blowing process. film production continuity
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1-16 and comparative example 1-4
[0040] According to the formula shown in Table 1, PBAT resin, tetrahydrofuran, antioxidant 1010, erucamide and other additives were mixed and put into the extruder, extruded and granulated at 170°C-210°C to obtain the composition. Put the composition into a film blowing machine after drying, and obtain a PBAT film through extrusion and film blowing. The performance test data are shown in Table 1.
[0041] Performance evaluation method:
[0042] (1) The thickness of the film is tested with a spiral micrometer: take 10 measuring points evenly on the film of 1m*1m for measurement.
[0043] The film thickness extreme difference is the difference between the maximum thickness value and the minimum thickness value among the 10 measurement points.
[0044] The relative deviation of film thickness is calculated according to the following formula:
[0045]
[0046] Among them, the average film thickness is evenly taken from 10 measurement points on the film of 1m*1m, and the arit...
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Abstract
The invention discloses a poly(butyleneadipate-co-terephthalate) (PBAT) resin composition. The PBAT resin composition comprises a, PBAT, and b. tetrahydrofuran, wherein the PBAT resin composition contains 10-500ppm of tetrahydrofuran. Through use of a trace amount of tetrahydrofuran in the composition, tetrahydrofuran content of the PBAT resin composition is controlled in a range of 10-500ppm so that when a film blowing extrusion rate of the PBAT resin composition is 178Kg / h, a film thickness range is less than 0.2 microns and film thickness relative deviation is less than 1%. The composition has improved film blowing characteristics. Tetrahydrofuran in the resin has lubrication effects, prevents nonuniform stress distribution-caused hole blowing at vesicle positions in blow molding and guarantees film blowing production continuity.
Description
technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a PBAT resin composition. Background technique [0002] Polybutylene adipate terephthalate (PBAT) is a copolymer of butylene adipate and butylene terephthalate, which has the characteristics of both PBA and PBT. Polybutylene adipate terephthalate (PBAT) contains flexible aliphatic chains and rigid aromatic chains, so it has high toughness and high temperature resistance, and due to the presence of ester bonds, it is also biodegradable. It is very active in the research of biodegradable plastics and one of the best degradable materials in the market. [0003] However, PBAT resin also has the following defects: For example, when the film is blown at a higher speed, the thickness of the film material is very different, and in the blowing process, there will be holes in various parts of the film bubble due to uneven stress distribution, which affects the blowing process....
Claims
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IPC IPC(8): C08L67/02C08K5/1535
Inventor 赵巍苑仁旭唐美军焦建熊凯钟宇科杨晖麦开锦郭志龙董学腾曾祥斌
Owner ZHUHAI WANTONG CHEM