KR20050117192A - Sheet composition use for bamboo - Google Patents

Abstract

The present invention relates to an environment-friendly sheet composition using bamboo which is environmentally friendly and can bring about a lighter weight of the product. Needle-shaped needle structure having a cutting length of 3 to 8 mm as a main material for the whole composition of the sheet 35.0 ~ 65.0% by weight of bamboo fiber pulverized bamboo having a component having a needle-like needle-like structure of more than 50% and a cutting length of more than 3-8mm and less than 50%, Heat deflection temperature

(heat distortion temperature) above 90 ℃ polypropylene, polyethylene, A.B.S, poly-stylene, P.C.

31.0-55.0 wt% of thermoplastic resins such as (poly-vinyl chloride), P.E.T,

As an auxiliary material, 3.8-9.0 wt% of maleic anhydride-modified polypropylene, a compatibilizer for increasing the binding force between the bamboo fiber and the highly crystalline polypropylene, and 0.05-0.4 wt% of a heat stabilizer as other additives, and phenol and phosphorus for preventing oxidation The present invention relates to an environment-friendly sheet composition using bamboo, which is composed of 0.05 to 0.2% by weight of phenol and phosphorus antioxidant mixed with 0.1 to 0.4% by weight of carbon-black.

Accordingly, it is more environmentally friendly and easier to use resources than sheets using wood powder, etc., which is pulverized with the conventional wood composition as described above, and in particular, the light weight and tensile strength, flexural strength, flexural modulus, heat resistance, etc. It is a very advantageous invention with the effect of improving physical properties.

Description

Eco-friendly sheet composition using bamboo {SHEET COMPOSITION USE FOR BAMBOO}

The present invention relates to an environmentally friendly sheet composition using bamboo, in particular

By crushing bamboo and kneading with thermoplastic resins such as polypropylene (PP) at a certain ratio, it is environmentally friendly and easy to use resources. It relates to an environmentally friendly sheet composition using this excellent bamboo.

Conventionally, wood powder pulverized with natural fiber is kneaded with resins such as polypropylene (P.P).

There is a way to manufacture the sheet, but due to the use of wood that takes several decades to grow into mature wood, there are problems such as environmental destruction and limitations in supply and demand of raw materials. There was a problem that the physical properties such as tensile strength and flexural strength were lowered during fabrication. Especially, in order to satisfy the physical properties of products requiring rigidity such as automobile interior parts, the thickness of the sheet must be made thick, resulting in excessive weight of the car interior sheet. When the furnace is used, there are problems such as lower fuel efficiency, lower workability, and higher cost.

The present invention has been made in order to solve the problems described above, the object is environmentally friendly and easy to use resources, and at the same time, compared to the sheet manufactured by mixing wood powder pulverized conventional wood with synthetic resin sheet is a finished product The present invention provides an environmentally friendly sheet composition using bamboo having excellent physical properties such as light weight and tensile strength, flexural strength, flexural modulus, and heat deformation temperature.

Environmentally friendly sheet composition using bamboo of the present invention for achieving the above object;

As a main material for the overall composition of the sheet, bamboo has a needle-like structure having a needle-like needle structure of 3-8 mm in length and a cut length of 3-8 mm or more. 35.0 to 65.0% by weight of bamboo fiber crushed and processed bamboo having less than 50%;

Polypropylene with heat distortion temperature above 90 ℃

(poly-propylene), polyethylene (poly-ethylene), A.B.S, polystyrene

31.0-55.0 wt% of thermoplastic resins such as polystylene, poly-vinyl chloride, and P.E.T;

As an auxiliary material, for increasing the bonding force of the bamboo fiber and the heat resistant resin

3.8-9.0 weight% of maleic anhydride modified polypropylene which is a compatibilizer;

Other additives include 0.05-0.4% by weight of calcium stearate (Ca-st), a heat stabilizer, and

Phenolic and phosphorus antioxidant mixed with phenol and phosphorus to prevent oxidation (Brand name: BB 021)

0.05 to 0.2% by weight, characterized in that consisting of 0.1 to 0.4% by weight of carbon black pigment.

Bamboo fiber used in the present invention can be kneaded well with thermoplastic resin,

Bamboo is crushed and cut to have a needle-like needle-like structure with a cutting length of 3-8 mm, and the above components are 50% or more, and the needle-shaped needle-shaped structure having a cutting length of 3-8 mm or more and less. 35.0 ~ 65.0% by weight of bamboo fiber (bamboofiber) formed of less than 50% of the crushed, cut components, preferably 38.0 ~ 60.0% by weight;

(Bamboo Fiber related pictures)

The thermoplastic resin of the present invention has a heat distortion temperature

Poly-propylene, polyethylene, A.B., poly-stylene, poly-vinyl chloride, p. E.T (PET) is used, and its content is 31.0 to 55.0 parts by weight, preferably 35.5 to 55.0 weights of isotactic highly crystalline polypropylene having methyl groups aligned in the same direction based on the main chain. It is good to use wealth.

Further, in order to increase the bonding force between the bamboo fiber and the thermoplastic resin or the bonding force between polypropylene and polypropylene, the terminal functional group is grafted to have one functional group as a compatibilizer (hydroxyl group, amino group, Maleic anhydride-modified P.P. (pp) of the structure having a carboxyl group: CM-1120 (manufactured by Honam Petrochemical), KH-845-4 (manufactured by Essontech Corporation), SILQUEST-A-151 (manufactured by Duri) KC) is used, the content is suitable 3.8 ~ 9.0% by weight, preferably it is preferable to use 4.0 ~ 6.5% by weight of CM-1120;

As other additives, it uses calcium stearate (Ca-st), a thermal stabilizer for thermal stability, and its content is appropriately 0.05 to 0.4% by weight, preferably 0.2% by weight, phenol for preventing oxidation And phenol and phosphorus antioxidant mixed with phosphorus.

BB 021 (manufacturer: Asian additives) is used. The content is appropriately 0.05 to 0.2% by weight, preferably 0.1% by weight, and carbon-black is used as the pigment and the content is 0.1. ~ 0.4% by weight is suitable, preferably characterized by consisting of 0.2% by weight.

With the composition as described above, the present invention is pulverized, cut to have a needle-like needle-like structure of 3 ~ 8mm cutting length in order to meet the product that requires high rigidity, such as automotive interior materials, the weight of the product is required. The above-mentioned components are 50% or more, and the crushed and cut components are formed to less than 50% to have a needle-like needle-like structure having a cutting length of 3-8 mm or more and less than that. Maleic anhydride-modified polypropylene having a structure in which the terminal functional group has a hydroxyl group, an amino group, or a carboxyl group is used as the polypropylene (PP) grafted to have a single functional group as a compatibilizing agent, while being well kneaded. By increasing the bonding force between the bamboo fiber and high crystalline polypropylene compared to the sheet using the wood powder pulverized conventional wood By enabling the thickness 20 to 30% decrease was more than allowing the weight of the finished sheet according to a reduced thickness, while being the product is light-weight properties, such as the main rigidity properties of tensile strength and flexural strength, flexural modulus are improved.

Hereinafter, an embodiment of the present invention will be described in more detail.

The following examples are only intended to describe specific embodiments of the present invention and are not intended to be limited by the examples of the present invention.

Example was prepared by a known kneading and extrusion manufacturing method for producing a sheet in a composition ratio (content: weight%) as shown in Table 1, Comparative Example was prepared in the same manner as in the composition ratio (content: weight%) as shown in Table 2 As a commercial product used as a vehicle interior sheet manufactured by the method, the main physical property analysis results of Examples and Comparative Examples are shown in Table 3.

Unit: weight% ingredient Example 1 Example 2 Bamboo Fiber 49.5 45.0 High Crystalline P.P 45.0 50.0 Maleic anhydride modified P.P 5.0 4.5 Calcium stearate 0.2 0.2 Antioxidant (BB021) 0.1 0.1 Carbon black 0.2 0.2

Unit: weight% ingredient Comparative example Wood powder 44.8 General p.p. 48.8 Tarc 6.0 Antioxidant (antimony oxide) 0.2 Carbon black 0.2

Example 1

Bamboo crushed and cut so that the cutting length has a needle-like needle-shaped structure of 7 mm, the cutting component is 55%, the cutting length is 10%, the component is 20%, and the cutting length is 25 mm. 49.5 weight%, 45.0 weight% of high crystalline polypropylene, 5.0 weight% of maleic anhydride modified polypropylene (brand name: CM-1120), 0.2 weight% of calcium stearate which is a heat stabilizer, 0.1 weight% of antioxidant (brand name: BB-021) 0.2 wt% of carbon black, which is a pigment, was kneaded to prepare a sheet having a thickness of 2.0 mm through a known extruder.

Example 2

Bamboo crushed and cut so that the cutting length has a needle-like needle-shaped structure of 7 mm, the cutting component is 55%, the cutting length is 10%, the component is 20%, and the cutting length is 25 mm. 45.0 weight%, 50.0 weight% of high crystalline polypropylene, 4.5 weight% of maleic anhydride modified polypropylene (brand name: CM-1120), 0.2 weight% of calcium stearate which is a heat stabilizer, 0.1 weight% of antioxidant (brand name: BB-021) 0.2 wt% of carbon black, which is a pigment, was kneaded to prepare a sheet having a thickness of 2.0 mm through a known extruder.

[Comparative Example]

44.8% by weight of wood powder, 48.8% by weight of general-purpose polypropylene, 6.0% by weight of tar, 0.2% by weight of antimony oxide as an antioxidant, and 0.2% by weight of carbon black as a pigment, which is manufactured through a known extruder. It is a sheet of thickness 2.0mm used.

Specific gravity test method ASTM D792

Tensile Strength Test Method ASTM D638

[Bending Strength, Flexural Modulus Test Method] ASTM D790

[HDT Test Method] ASTM D648

Property comparison unit Example 1 Example 2 Comparative Example 1 importance g / cm 3 1.08 1.10 1.11 The tensile strength g / cm 3 Longitudinal direction 427 395 223 Transverse 270 254 172 Flexural strength g / cm 3 Longitudinal direction 844 766 467 Transverse 526 496 370 Flexural modulus g / cm 3 Longitudinal direction 44340 41290 36400 Transverse 28740 28010 26820 Heat Deflection Temperature (H D T)      ℃ 127 124 121 121 118 113

As can be seen from the table, in the case of a sheet having a thickness of 2.0 mm produced by the same manufacturing process, the composition of the present invention of Examples 1 and 2 appeared to have excellent physical properties compared to the comparative example, in particular Example 1, In case of 2, the tensile strength and flexural strength of the same thickness were shown to be more than twice as excellent as the comparative example, indicating that the stiffness was excellent, thereby demonstrating that the weight of the product can be reduced, and that the flexural modulus and thermal deformation temperature Physical properties were much better than the comparative example.

As described above, the present invention is 50% or more of the crushed and cut components of the composition and bamboo of the present invention so that the cutting length has a needle-like needle-like structure of 3-8mm, the cutting length is 3-8mm or more And a bamboo fiber with less than 50% of the pulverized and cut components to have a needle-like needle-shaped structure of less than 50%, and the thickness can be reduced by 20 to 30% or more as compared to a conventional sheet using wood powder. It is possible to reduce the weight of the finished product sheet and improve the workability.In particular, even though the weight of the product is light, the physical properties such as tensile strength, flexural strength, flexural modulus, and thermal deformation temperature are improved. It is a very advantageous invention that can also bring effects such as fuel economy when used as a vehicle interior sheet.

Claims (4)

As a main material for the overall composition of the sheet, bamboo has a needle-like structure having a needle-like needle structure of 3-8 mm in length and a cut length of 3-8 mm or more. 35.0 to 65.0% by weight of bamboo fiber crushed and processed bamboo having less than 50%; Polypropylene with heat distortion temperature above 90 ℃ (poly-propylene), polyethylene (poly-ethylene), A.B.S, polystyrene 31.0-55.0 wt% of thermoplastic resins such as polystylene, poly-vinyl chloride, and P.E.T; As an auxiliary material, 3.8-9.0 weight% of maleic anhydride modified polypropylene which is a compatibilizer for increasing the binding force of said bamboo fiber and heat-resistant resin; Other additives include 0.05-0.4% by weight of calcium stearate (Ca-st), a heat stabilizer, and Phenolic and phosphorus-based phenol for antioxidant, phosphorus-based antioxidant 0.05 ~ 0.2% by weight, environmentally friendly sheet composition using bamboo, characterized in that consisting of 0.1 to 0.4% by weight of carbon black pigment. The method of claim 1, wherein the polypropylene (poly-propylene) used as a thermoplastic resin is characterized in that the high crystalline polypropylene of isotactic (isotatic) structure of the methyl group in the same direction based on the main chain specified below Eco-friendly sheet composition using. The maleic anhydride-modified polypropylene according to claim 1, wherein the maleic anhydride-modified polypropylene as a compatibilizer is a polypropylene (PP) grafted to have one functional group. Eco-friendly sheet composition using bamboo, characterized in that (poly-propylene) is used. The method of claim 1, wherein any one of the thermal stabilizers used as other additives, calcium stearate (Ca-st), antioxidants, phenols and phosphorus-based phenols, phosphorus antioxidants, and pigments, carbon black, are excluded or only one. Eco-friendly sheet composition using bamboo, characterized in that the whole can be used to form a 0.2 to 1.0% by weight.