RO131033A2 - Process and composition for obtaining polyolefins/pvc/animal biomaterial composites - fulgplast - Google Patents

Abstract

The invention relates to a biocomposite and to a process for obtaining the same to be used in thermoplastic processes. According to the invention, the biocomposite consists of polypropylene with a flow index of 2.5 g/10 min and a density of 0.922 g/cm, and polypropylene with a flow index of 0.75 g/10 min, and a density of 0.960 g/cm, microfibers of animal origin, having sizes of 2...180 μm, up to 3% usual additives, up to 0.5% lubricants, up to 0.25% coupling and compatibility agents, up to 2% filling agent, and, possibly, up to 0.4% antioxidant, antiUV, antimicrobial, antifungal agents and dyes. As claimed by the invention, the process consists in mixing the components on a single-screw extruder, at a temperature of 140...180°C, wherefrom the product results as granules.

Description

"PROCESS AND COMPOSITION FOR OBTAINING POLYOLEFIN / PVC ZBIOMATERIAL COMPOUNDS OF ANIMAL ORIGIN FULGPLAST"

The present invention relates to the production of biocomposites based on polyolefins or PVC with biomicrofibers of animal origin (microfibers from flake / feather waste) and various coupling agents and ingredients, and respectively, the process for obtaining them.

It is known that polyolefins and PVC are hydrophobic polymers incompatible with most natural polymers, these drawbacks reducing their applicability in mixtures with natural polymers;

The advantage of using biomaterial of animal origin from waste flakes / feathers in the polyolefin / PVC matrix is that they have both economic and environmental benefits. The biomaterial of animal origin having specific properties compatible with the polymer matrix, low density and not being abrasive ensures a good machinability by thermoplastic processes.

The following are known disadvantages: low adhesion between the polymeric matrix and the filling biomaterial, the processing temperature must be correlated with the thermal stability of the biomaterial of animal origin to obtain biocomposites.

The object of the invention consists in making biocomposite materials based on polyolefins or PVC with biomicrofibers of animal origin (microfibers from flake waste) and various coupling agents and ingredients, and respectively, the process for obtaining them in order to obtain physical properties. their optimal mechanical and thermal properties.

The problem solved by the invention is to establish a ratio between components as well as the optimal thermoplastic processing parameters that lead to the achievement of the proposed purpose.

The process according to the invention eliminates the mentioned disadvantages in that compositions such as:

^ -2013-- 005682 9 -07- 2013 • selectively, two types of polyolefins: polypropylene with flow index

2.5 g / 10 min. (230 ° C / 2,160 g) and density 0.900 g / cm ³ and polyethylene with flow index 0.75 g / 10 min. (230 ° C / 2,160 g) and density 0.922 g / cm ³ , or PVC with flow index 2.4 g / 10 min. (230 ° C / 2,160 g) and density 0.960 g / cm ³ • biomicrofibers of animal origin (flake / feather waste microfibers) with dimensions of 2-180 pm, • various additives up to a cumulative percentage of 3%, respectively lubricants (eg zinc stearate) up to 0.5%, coupling agents and compatibilizers (eg Surlyn or maleic anhydride) up to 0.25%, filler for improving thermoreological properties (eg talc) up to 2%, and at application: antioxidants, antiUV, antimicrobials, antifungals, dyes, etc. in proportions up to 0.4%.

The process for obtaining the composition consists in mixing the components in the ratios established on a single screw extruder, L / D = 25, the temperature range between 140-180 ° C and obtaining Pelleter type granules, which can be further used for obtaining finished products by thermoplastic processes. The test specimens are obtained by injection at a temperature of 195 ° C for 20 s, the injection piston pressure is 9 MPa and the mold temperature is 30 ° C. The samples obtained will be left for 3 days at room temperature before being tested.

By applying the invention the following advantages are obtained:

• new types of semi-finished biomaterials are obtained that can be further used to obtain finished products by thermoplastic processes;

• superior recovery of flake / feather waste from the food industry, which is an environmental problem difficult to solve based on burning or storage in landfills;

• superior recovery of polyolefin / polyvinyl chloride waste, which can be integrated directly into biocomposite technology;

The following is an embodiment of the invention:

oe 2 Ο 1 3 - - 0 0 5 6 8 2 9 -07- 2013

Example: An integrated technological line is made according to the scheme in Fig. 1. In summary, the pre-made mixture is thermally processed on a single screw extruder by thermal mixing of 225 g PE with a flow index of 0.75 g / 10 min. and the density of 0.922 g / cm ³ with 155 g biomicrofibre from flake / feather waste and 11 g various additives (lubricants, coupling agents and compatibilizers, filler), the temperature profile being between 140-180 ° C. Finally, Pelleter type granules are obtained, which can be further used for various finished parts made by thermoplastic processes (extrusion, injection, etc.).

Below in table 1 are presented the data of the mechanical tests performed on the specimens obtained by injection at a temperature of 195 ° C from these pellet type granules.

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Determination of tensile strength, SR EN 319: 1997

Table 1

No. crt Determined characteristics Symbol UM Value / No. specimen Medium value 1. The length of the test piece of mm 1 2 3 4 50.30 50.12 49.32 49.52 - 5 6 7 8 51.44 50.83 50.14 49.23 - 2. The width of the test tube b mm 1 2 3 4 51.28 50.55 50.03 51.24 - 5 6 7 8 50.42 49.23 49.34 50.02 -

No. crt Determined characteristics Symbol UM Value / No. specimen Medium value 3. Breaking force F max N 1 2 3 4 1080 1100 990 985 - 5 6 7 8 1000 1020 980 990 - 4. Traction resistant FT1 N / 2 mm 1 2 3 4 0.42 0.43 0.40 0.39 • 5 6 7 8 0.38 0.41 0.40 0.40 0.40

Authorized legal representative PRESIDENT - DIRECTOR GENERAL,

¢ - 2 0 1 3 - 0 0 5 6 8 2 9 -07- 2013

ΙϋΕϋυΝ SĂ

RESEARCH INSTITUTE FOR CONSTRUCTION EQUIPMENT AND TECHNOLOGIES

RESEARCH INSTITUTE FOR CONSTRUCTION EQUIPMENT AND TECHNOLOGY

Claims (2)

PROCESS AND COMPOSITION FOR OBTAINING POLYOLEFIN / PVC / BIOMATERIALS OF ANIMAL ORIGIN - FULGPLAST COMPOUNDS 1. Biocomposites based on polyolefins or PVC with biomicrofibers of animal origin (flake / feather waste microfibers) and various coupling agents and ingredients, respectively: selectively, two types of polyolefins: polypropylene with flow index 2.5 g / 10 min . (230 ° C / 2,160 g) and density 0.900 g / cm ³ and polyethylene with flow index 0.75 g / 10 min. (230 ° C / 2,160 g) and density 0.922 g / cm ³ , or PVC with flow index 2.4 g / 10 min. (230 ° C / 2,160 g) and density 0.960 g / cm ³ ; biomicrofibers of animal origin (flake / feather waste microfibers) with dimensions of 2-180 pm; various additives up to a cumulative percentage of 3%, respectively lubricants (eg zinc stearate) up to 0.5%, coupling agents and compatibilizers (eg Surlyn or maleic anhydride) up to 0.25%, filler for improving thermoreological properties (talc example) up to 2%, and on request: antioxidants, antiUV, antimicrobials, antifungals, dyes, etc. in proportions up to 0.4%. 2. Process for the production of biocomposites based on polyolefins or PVC with biomicrofibers of animal origin (microfibers from flake waste) and various coupling agents and ingredients, characterized in that the components are mixed in the ratios set out in point 1 on a single screw extruder, L / D = 25, temperature range between 140-180 ° C and obtaining pellet type granules, which can be further used to obtain finished products by thermoplastic processes.