Shanghai Daoqin Plastics Co., Ltd.

          polypropylene (PP) (PP) tool has force property can good, density small, chemical resistant property good and other advantages, in automotive application scope non 常广泛, statistics, in automotive 方面PP use amount automotive plastics use amount 50%. for use PP modified technology research is 层出不穷, from resistant 划伤, light, low odor low VOC and other summary use PP several modified technology and large separation 享.

        车 use PP resistant property can improvement

        1, add filler in automotive use process in, inner trim parts is by use 者接触 most more automotive parts, its by 划伤 风险 non high.

        PP is automotive inner trim parts most commonly used types material, commonly used production table/sheet 盘, sheet/plate and other inner trim parts, its surface resistant property can very 差, add micro structure sheet/slice 状, fiber or filler (如 slip powder, silicon 灰石, glass beads and other) can improve/increase PP hardness, modulus and other, in 一定程 degree upper improvement PP resistant property can. in this filler in, slip powder cost versus for relatively low, is PP commonly used filler, slip powder for PP resistant property can improvement silicon and other filler, another, slip powder filling PP generally need add elastomer toughened, this reduce material resistant property can.

        2, add resistant agent resistant agent essence upper is types lubricant, can to surface formed lubricated 层, from reduce material surface friction coefficient, improve/increase PP材 material surface resistant property can.

         commonly used resistant agent is small separation amine type lubricant, acid amine, acid amine and other. this category of small separation lubricant can fast speed to material surface, formed thin thin lubricated 层, small add amount can 赋予材 material excellent resistant property can, price low 廉. this small separation amine type lubricant easy make made parts surface generate viscous phenomenon, also easy dispersion 发挥发 property gas 体.

         has machine fluorine or has machine silicon type (如 silicon ketone) material tool has non low surface force, easy in material surface 富集, molecular weight large, easy 挥发, 因而也 can used as PP resistant agent.

        3, amine type and has machine silicon type resistant agent comparison Kingfa corporation has company comparison research amine type and has machine silicon type resistant agent for elastomer toughened slip powder filling PP材 material effect/influence.

        （1） formulation

        PP 64.4份, slip powder 20份, POE 15份, black masterbatch 1份, additives (包括 antioxidant and light stabilizer)0.6份, resistant agent 2份.

         its in, add amine type resistant agent material is 1#, add has machine silicon type resistant agent material is 2#.

        （2） resistant property can

         using/adopting 十字划伤仪 according to large standards PV3952–2002 testing material in normal temperature and hot aging (102℃, 168 h) rear resistant property can, use ΔL value table/sheet 示, its in L value table/sheet value, using/adopting Color Difference 仪进行测 amount. 皮纹划伤 front L value is L1, rear L value is L2, ΔL=L2–L1.

         normal temperature lower 1# and 2# resistant property can meet/satisfy requirements, 1#略 excellent 于2#;但 hot aging rear, 1# resistant property can obvious 变差, 而2# resistant property can still excellent, ratio normal temperature resistant property can also has improve/increase.

        （3） dispersion property can

        1# and 2# dispersion 发 总挥发 property has machine combined material (TVOC) content separation is 18.47 μgC/g and 14.16 μgC/g, system TVOC content meet/satisfy requirements (low 于50 μgC/g). from table/sheet in can 看出, 2# in odor and other grade and VOC方面总体 upper low 于1#.

        （4）雾 degree

        2# gloss degree maintain rate relatively high, degree obvious low 于1#.

        （5） force property can

        2# fracture elongation, impact strong/high degree and MFR均 high 于1#, bending elastic property modulus low, its versus large.

        （6） summary and products

        两 types resistant agent in normal temperature lower make PP tool has relatively good resistant property can, has machine silicon type resistant agent in PP材 material hot aging rear still make its maintain excellent resistant property can, meanwhile in odor, VOC, degree tool has relatively large advantages, in tough property and processing property 方面也 tool has advantages.

        由 has machine silicon type resistant agent production automotive PP inner trim parts lower 图 示.

         automotive table/sheet use light PP

         automotive table/sheet related parts need material tool has good light property anti light, therefore need for PP 进行遮 light modified.

         plastics light modified technology main/primary resin blending, filling, di toward tensile, add light additives and other technology.

         resin blending main/primary is in transparent resin in add transparent resin, make its micro structure generate different versus make 折射系数发生改变, from reduce material light transmittance.

         filling modified is in resin in add 入粒径 relatively large material 质, can light long small its 粒径而不 can 透 矿 material 质, from to reduce light transmittance function.

         di toward tensile technology main/primary for already molding products, through di toward tensile make material orientation crystallization, micro structure 变 规整, retardant can light through.

        添 add light additives is through mixed titanium powder, SiO2, oxidation zinc and other tool has high cover/cap force and light force additives, from has retardant can light through.

         heavy poly engineering plastics has responsibility company and other 发现当 slip powder 粒径 is 10 μm, quality separation is 40%时, PP light transmittance most low, its light property can most good, in 此基础 upper design types automotive table/sheet use light PP formulation.

        1, formulation PP 48%, POE 6%, slip powder 40%, 复配遮 light agent 5%, antioxidant (汽巴1010 and 168)0.5%, lubricant di hard amine 0.5%.

         above content is quality separation 数, 复配遮 light agent formed separation is titanium powder and types carbon material, quality ratio is 99.95∶0.05.

        2, property can formulation lower, material light transmittance small 于0.1%, make 2 mm壁 thick sheet/plate to full light 效果(即 use strong/high light from rear 照射样 sheet/plate, sheet/plate 未出现 light 斑), 鉴于仪 table/sheet thick usually is 2 mm left right, can is formed made 备 一 types automotive table/sheet light PP specialized material.

        该材 material its it property can lower: tensile strength 25 MPa, fracture elongation 17%, notched impact strength 10.3 kJ/m2, flexural strength 35.6 MPa, melt flow rate 12 g/(10 min).

         using/adopting material injection molding automotive table/sheet sheet/plate lower 图 示, thick degree is 2 mm, can meet/satisfy full light, light requirements.

         low odor low VOC车 use glass fiber reinforced PP

        随 消费者 for automotive product quality requirements improve/increase, for automotive inner trim parts product odor property more high requirements.

         different material generate odor causes different, 南京立汉 chemical has company research use glass fiber (GF) reinforcement PP in odor 源, in 此基础 upper, through selection combined compatibilizer add odor absorption agent made low odor low VOC车 use GF reinforcement PP.

        1, main/primary Raw Materials

        2, different resin effect/influence

        注: table/sheet in odor and other grade according to automotive odor property experiment/testing testing standards Q/JLY J711061–2009 testing, separation 10 and other grade, odor and other grade high table/sheet odor light, 1 grade table/sheet odor use method 忍受, 10 grade table/sheet odor.

         can 看出, 无论PP基体 is powder material also is material, different formulation material odor and other grade is 4 grade. 由此推测 in GF reinforcement PP system in, odor most 根本 源 in 于 compatibilizer PP-g-MAH.

        3, different compatibilizer effect/influence

         can 看出, due to KT-1 is melt grafting PP-g-MAH, its grafting rate high (generally is 0.8%), need use amount large, add its mono 体残留 more, therefore material odor and other grade low.

         compatibilizer 7452 and 9012均 using/adopting solid versus grafting process, process production compatibilizer grafting rate versus for relatively high, usually large 于1.0%, need use amount low, add mono 体残留 less, therefore material odor and other grade high.

        4, odor absorption agent effect/influence will nano oxidation zinc and nano oxidation titanium quality ratio 1︰1配 made formed odor absorption agent, specific formulation and property can lower table/sheet 示.

        添 add odor absorption agent rear, material force property can has decline, decline degree relatively small, odor and other grade ratio improve/increase and other grade.

        该 odor absorption agent principle main/primary is through nano oxidation zinc and nano oxidation titanium pellets surface 吸附效应 will material in small separation material especially is 游离MAH mono 体吸附 in nano pellets surface, again through di screw extrusion machine extrusion production process in 抽 true process will this small separation from material in 抽离出, from to remove material odor 效果.

         another, compatibilizer 7452 grafting rate high 达7%, appearance upper 呈淡黄 color, compatibilizer 9012 grafting rate is 1.2%, transparent white. can 看出, high grafting rate compatibilizer has to material belt/tape high force property can, odor and other grade low and other grade.

        5, VOC experiment/testing  

        6, summary and products in made low odor low VOC车 use GF reinforcement PP时, amount selection solid versus grafting process production compatibilizer PP-g-MAH, grafting rate 不宜太 high.

        以 nano oxidation zinc and nano oxidation titanium is odor absorption agent combined extrusion 时 抽 true 空, can made low odor low VOC GF reinforcement PP, formulation made formed automotive system electrical machine 风扇 叶轮如 lower 图 示.