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Date: 2020-05-17 10:07 Views: 3084 Source: Internet

lubricant is type use improvement plastics, and other polymer processing properties and table/sheet property can additives. remove generally upper decrease/reduce abrasion scratch, improve/increase resin or material processing process in flow property and demolding property function outer, lubricant function also can to increase products surface light property, anti products between versus viscous and other interface property can 方面. processing modified function 而言, lubricant in polymer processing process main/primary reduce resin or material and processing equipment between and polymer separation between versus abrasion scratch, 进而达 to reduce 扭矩, can consumption, promote flow and improve/increase quality 目.

lubricant can separation is inner, outer lubricant types, inner, outer lubricant separation main/primary its and resin versus property large small.

inner lubricant and resin hydrophilic and force large, its function is reduce large separation function force;

outer lubricant and resin hydrophilic and force small, its function is reduce and processing machine between scratch.

inner, outer lubricant separation is versus for 而言, 并无严格划 separation standards. in property different resin in, inner, outer lubricant function has can can 发生变化.

一, lubricant function

inner lubricant function has below/following 三方面:

(1) make resin stability 塑化, anti 止塑化时转矩急剧 rise high;

(2) reduce resin melt viscosity, increase flow property, make screw decline, increase extrusion amount and production amount;

(3) improve/increase processing can force, decrease/reduce equipment negative 荷, improve/increase can amount efficiency.

outer lubricant function has below/following 五方面:

(1) anti due to resin and molding metal surface scratch hot resin separation understanding and color;

(2) anti in molding processing machine surface 烧结;

(3) improve/increase surface property can;

(4) improve/increase demolding property;

(5) improve/increase formed product surface light slip property.

二, lubricant types type

saturated and type —— saturated and type property can separation is non property 烃（如 polyethylene wax and polypropylene (PP) wax ）, property 烃（如 chlorine wax and oxidation polyethylene (PE) and other ）. main/primary used for PVC无毒 outer lubricant.

liquid wax ——俗称白油, is color transparent liquid 体, can used as PVC transparent property inner lubricant, use amount is 0.5 份 left right. in extrusion process in, liquid wax lubricated property relatively good, effect/influence heat stabilized property;
solid wax —— also is 天然石 wax, white solid 体, can used as PVC outer lubricant, use amount 0.1~1.0 份, use amount large effect/influence transparent degree;
micro wax —— also is high melting point wax, appearance is white or color solid 体, crystallization micro fine is micro wax. lubricated and heat stabilized property good its it wax. in PVC in use amount relatively small, generally is 0.1~0.2 份;
low molecular weight polyethylene (PE) —— also polyethylene wax, appearance is color or color solid 体, transparent property 差. can used for PVC extrusion and calendering processing, use amount generally is 0.5 份 below/following;
oxidized polyethylene wax —— is polyethylene wax separation oxidation material, appearance is white powder 末; tool has excellent inner, outer lubricated function, transparent property good, price low; use amount is 0.1~1.0 份;
chlorine wax ——同PVC versus property good, transparent property 差, and its it lubricant use good. use amount 0.3 below/following is 宜.

metal type ——既 is excellent heat stabilized agent, also is types lubricant, its inner, outer lubricated function has, different product types heavy has different.

commonly used metal type used for lubricant add amount 如: PbSt——0.2~1.0份; LiSt——0.6份; CaSt——0.2~1.5份; ZnSt——0.15; BaSt——0.2~1.0份.

aliphatic amine ——包括 mono acid amine and di 脂肪酰 amine large type.

mono 脂肪酰 amine —— main/primary inner lubricated function, specific product types has hard acid acid amine, acid amine and 蓖麻油 acid amine and other;
di acid amine —— main/primary outer lubricated function, specific product types has N, N—亚乙基 di hard acid amine and N, N—亚乙基 di alcohol acid acid amine and other.

脂肪 acid ester type

hard acid 丁脂—— appearance is color or color liquid 体, in PVC in inner lubricated is outer lubricated function, use amount 0.5~1.5份;
mono hard acid ester ——代号GMS, appearance is white wax solid 体, is PVC excellent inner lubricant. for transparent property effect/influence small, add amount low 于1.5份, can and hard acid use.

脂肪 alcohol type

hard alcohol —— appearance is white fine material, inner lubricated function, transparent good, in PVC in use amount 0.2~0.5份, in addition, also can used for PS in;
季戊四 alcohol ——PVC high temperature lubricant, use amount 0.2~0.5份.

三, lubricant selection 准则

1, different processing methods selection

▶▶ a, calendering molding ——目 is anti viscous 辊, reduce melt viscosity and high flow property. lubricant application inner lubricant and outer lubricant combined use, commonly used product types metal is 主, 并适当配以 hard acid;

▶▶ b, extrusion and injection molding ——目 is reduce viscosity, high flow property and easy demolding. lubricant generally inner lubricant is 主, lubricant generally ester, wax combined use;

▶▶ c, pressure and lamination molding ——以 outer lubricant is 主, commonly used product types is wax type lubricant;

▶▶ d, products molding —— lubricant use amount relatively less, inner lubricant is 主, liquid lubricant is 宜.

2, different products selection

soft products (soft products in has large increase agent, increase agent large its has excellent lubricated property, therefore lubricant use amount relatively less.)

a, in transparent film formulation in, selection metal type and liquid composite/compounding stabilizer, combined make hard acid (use amount small 于0.5份);

b, for/regarding blow molding film, is anti viscous 连, can selection hard acid mono ester;

c, in cable material formulation in, add filler, can using/adopting high melting point wax 0.3~0.5份 is lubricant.

hard products (lubricant use amount large soft products, for lubricated property can requirements relatively high.)

a, transparent products, blow molding bottle and transparent sheet/slice and other, commonly used has OP wax and E wax and other, add amount is 0.3~0.5 份, can and 0.5 份 hard acid positive ester or 0.5 份 hard acid combined.

b, transparent products sheet/plate and pipe/tube and other, commonly used metal 皂, wax and hard acid use. metal add amount is 1~2 份, wax and hard acid add is 0.3~0.5 份.

3, blending resin effect/influence

a, is improvement PVC impact property can, blending ABS, CPE and MBS and other resin;但 due to this blending resin and lubricant versus property large, versus increase lubricant use amount.

b, is improvement PVC surface gloss, add chlorine ethylene —乙 acid ethylene ester copolymer, need versus increase lubricant use amount.

4, lubricant and its it additives 关系

a, PVC in heat stabilized agent has lubricated function, different heat stabilized agent lubricated property large small lower: metal 皂> liquid alloy type >铅 salt > month acid 锡>马 acid 锡, alcohol has machine 锡. therefore, for/regarding heat stabilized agent lubricated function large, in its formulation in can versus decrease/reduce lubricant use amount. has machine alcohol type heat stabilized agent outer lubricated property, formulation in 需适当 add outer lubricant;而二丁基锡羧 acid ester heat stabilized agent outer lubricated function 突出, formulation in can decrease/reduce outer lubricant use amount.

b, processing additives large has outer lubricated function, can versus decrease/reduce lubricant add amount.

c, formulation in has a large amount of non lubricated filler 时, versus increase inner, outer lubricant add amount.

5, lubricant use amount

in formulation in, generally selection inner, outer lubricant use. lubricant use amount processing methods different 而异.

calendering molding: inner lubricant --0.3~0.8份, outer lubricant --0.2~0.8份;

extrusion and injection molding: inner lubricant --0.5~1.0份, outer lubricant --0.2~0.4份.

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