Ethylene Vinyl Acetate for customized solutions

Transcription

1 Ethylene Vinyl Acetate for customized solutions

2 The EVA copolymers of LG Chem. are thermoplastic materials produced by the copolymerization of ethylene with vinyl acetate comonomer. The copolymer has random branched structure as illustrated in Figure 1. Fig.1 Formation of an EVA Copolymer LG Chem. has developed family of high content vinyl acetate EVA copolymers, ranging up to 40%. Physical Properties The properties of EVA copolymers are dependent on vinyl acetate incorporation, molecular weight and molecular weight distribution. The effects of the vinyl acetate content to copolymer properties are shown in Figure 2. The influences of Melt Index on some important properties are also shown in Figure 3. Mechanical Properties As vinyl acetate content increases, the crystallinity decreases and its dependent properties such as tensile strength, hardness are reduced. The Melt Index affects certain mechanical properties, especially for processability. On the contrary to this, the rubbery properties like elasticity are increased. Thermal Properties Melt temperature declines almost linearly with increasing vinyl acetate content.(figure 4) But the impact strength and sealability of low temp. are improved with increase in vinyl acetate content. X = Vinyl Acetate Fig.2 Vinyl Acetate and product properties Increase in VA Incorporation improves increases Fig.3 Melt Index and product properties Decrease in Melt Index improves decreases Flexibility Clarity Sealability Adhesion Compatibility Blocking Tendency Tensile Strength Impact Strength Tear Strength processability Compound Properties The EVA copolymers are miscible in a wide range of ratios with various polyolefin resins. The addition of an EVA copolymer to an elastomer, improves properties such as stiffness, tear resistance and solvent resistance. The EVA copolymers also has good compatibility with various kinds of fillers and pigments, so they can be used as a base resin at functional compounds. Fig.4 Melt Temperature vs Vinyl Acetate Addition Melt Temp. ( C) % Vinyl Acetate (For resins with melt index less than 10) 2

3 Product Applications Photovoltaic Encapsulant (PVEN) The EVA encapsulants can be used as adhesion layers between glass and backsheet with cells inside the photovoltaic module. It delivers decades of service life with good transparency and adhesion property. Extrusion Coating The EVA copolymers can be extrusion-coated onto various substrates. The EVA coating will offer excellent sealability, clarity and good adhesion to substrates such as OPP, Nylon and PET films. The extrusion-coated films are generally applied for various thermal laminating films. Hot Melt Adhesive The EVA copolymers can be used as base polymer in the HMA product to control the viscosity, cohesive & adhesive strength and flexibility. High vinyl acetate content improves adhesion & flexibility and the speed of operation gets faster with higher MI. The main applications are packaging, wood veneering and bookbinding. Wire and Cable The use of EVA copolymers in crosslinked electrical applications can improve processability, the acceptance of higher filler loading, and heat resistance. The blends with applications in wire and cable industry are semi-conductive compounds, black jacket and hologen-free flame retardanat(hffr) formulations after blending with Polyolefins. Foaming The EVA foam can offer the elastic nature with softness and resilience, that mainly depends on the high vinyl acetate contents. Ease of crosslinking also rises with increasing vinyl acetate content. The sole of athletic shoes, sponge shoes and many kinds of cushions are the major application for EVA foaming. 3

4 EVA Copolymer Grade Application Grade Vinyl Acetate, % Melt Index Photovoltaic Encapsulant (PVEN) EP28015* EP28025* Extrusion Coating EL EL EA Hot Melt Adhesive (HMA) EA EA EA Wire and Cable (W&C) EC EC ES Foaming ES ES28005* 28 5 Film EF * Wire & Cable compound / Safety glass film / Hot melt adhesive etc. 4

5 Photovoltaic Encapsulant EP28015 EP28025 Copolymer of Ethylene Vinyl Acetate General Additive Application No Additive PhotoVoltaic Encapsulant Sheet Hot Melt Adhesive Wire & Cable Compound Properties Item Test Based on EP28015 Typical Value EP C ASTM D g/cm g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min 25 g/10 min Vinyl Acetate Content LG Method 28 wt% 28 wt% Melting Point, DSC LG Method 71 C 69 C Tensile Break ASTM D kg/cm 2 95 kg/cm 2 Break ASTM D % 850 % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D C 45 C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. Performance Uniform VA content and MI Excellent optical property Low gel level and contamination free Good adhesion property in the solar module 5

6 Extrusion Coating EL18018 EL18025 Copolymer of Ethylene Vinyl Acetate General Additive Anti-Oxidant Application Extrusion Coating Properties Item Test Based on EL18018 Typical Value EL C ASTM D g/cm g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min 25 g/10 min Vinyl Acetate Content LG Method 18 wt% 18 wt% Melting Point, DSC LG Method 85 C 84 C Tensile Break ASTM D kg/cm kg/cm 2 Break ASTM D % 850 % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D C 60 C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. Performance Uniform VA content and MI Low gel level and strict contaminant control Excellent transparency Stable high speed processability with good neck in Using coated product with LDPE, mlldpe, POE(Polyolefi n elastomer) 6

7 Hot Melt Adhesive EA19150 EA19400 EA28150 EA28400 Copolymer of Ethylene Vinyl Acetate General Additive Application Anti-Oxidant Anti-Agglomerate Hot Melt Adhesive Properties Item Test Based on Typical Value EA19150 EA19400 EA28150 EA C ASTM D g/cm g/cm g/cm g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min 400 g/10 min 150 g/10 min 400 g/10 min Vinyl Acetate Content LG Method 19 wt% 19 wt% 28 wt% 28 wt% Melting Point, DSC LG Method 80 C 78 C 70 C 68 C Tensile Break ASTM D kg/cm 2 55 kg/cm 2 40 kg/cm 2 30k g/cm 2 Break ASTM D % 850 % 900 % 900 % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D1525 <40 C <40 C <40 C <40 C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. Performance Uniform VA content and MI Products line with various VA contents and MI Excellent compatibility with other raw materials of HMA Good control organoleptic property 7

8 Wire and Cable EC15006 EC33018 Copolymer of Ethylene Vinyl Acetate General Additive No Additive Application Wire and Cable Compound Properties Item Test Based on EC15006 Typical Value EC C ASTM D g/cm g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min 18 g/10 min Vinyl Acetate Content LG Method 15 wt% 33 wt% Melting Point, DSC LG Method 89 C 62 C Tensile Break ASTM D kg/cm kg/cm 2 Break ASTM D % 900 % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D C <40 C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. Performance Uniform VA content and MI Excellent surface finish High filler loading (carbon black, flame retardant agent) Contaminants free Excellent electrical & mechanical property 8

9 Foaming ES18002 ES28002 ES28005 Copolymer of Ethylene Vinyl Acetate General Additive Application Anti-Oxidant Foam Compound Safety Glass Waterproof Sheet etc. Properties Item Test Based on Typical Value ES18002 ES28002 ES28005* 23 C ASTM D g/cm g/cm g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min 2.5 g/10 min 5 g/10 min Vinyl Acetate Content LG Method 18 wt% 28 wt% 28 wt% Melting Point, DSC LG Method 84 C 72 C 72 C Tensile Break ASTM D kg/cm kg/cm kg/cm 2 Break ASTM D % 830 % 800 % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D C 47 C 46 C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. * Wir and Cable Compound Performance Uniform VA content and MI Strict contaminants control Excellent mechanical properties Development of new formulation with POE(Polyolefi n elastomer) 9

10 Film EF18002 Copolymer of Ethylene Vinyl Acetate General Additive Application Anti-Oxidant T-die Film Waterproof Sheet Properties Item Test Based on Typical Value EF C ASTM D g/cm 3 Melt Index, 2.16 kg ASTM D g/10 min Vinyl Acetate Content LG Method 18 wt% Melting Point, DSC LG Method 84 C Tensile Break ASTM D kg/cm 2 Break ASTM D % Hardness, Shore A ASTM D Softening Point, Vicat ASTM D C The data and information represented are intended as a general guide only and are not construed as specifi cation limits. * Wir and Cable Compound Performance Uniform VA content and MI Low gel level and strict contaminant control Excellent transparency Stable processability with good neck in 10

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