Shanghai Daoqin Plastics Co., Ltd.

thermoplastic property elastomer (TPE) usually is modulus relatively low elastic property material, thermoplastic property elastomer in room temperature conditions lower can tensile long degree above, but also force remove rear, can 几乎恢复 to its long degree. hot solid property 橡胶材 material already 问世良久, currently, many can used for injection molding thermoplastic property elastomer positive in 取代传统 橡胶材 material. another, TPE广泛 used for rigid property thermoplastic property plastics modified, usually is impact resistant strong/high degree. for/regarding sheet/slice and generally grade composite/compounding material 说, this is versus 当普遍.

TPE types type other POM plastics raw materials

to 1996 year is 止, types main/primary TPE can by separation is large type: copolymer (styrene type resin, copolymer more ester, polyurethane ester and polyamide (PA)), and thermoplastic property plastics / elastomer mixed material and alloy (thermoplastic property polyolefin and thermoplastic property 硫化橡胶).

this type TPE by is versus system. from essence upper 说, hard thermoplastic property plastics formed versus, machine or chemical methods and soft elastomer formed versus combined, formed TPE tool has versus combined property 质.

传统 TPE types type

+ styrene type resin (S-TPE)+ copolymer more ester (COPE)+ polyurethane ester (TPU)

+ polyamide (PA) (PEBA)+ polyolefin mixed material (TPO)+ polyolefin alloy (TPV)

more multiple type thermoplastic property elastomer

remove versus system TPE以 outer, also 出现 两 types new technology. it is metallocene catalytic combined formed polyolefin property and elastomer, and reaction molding thermoplastic property polyolefin elastomer.

TPE new product types

+ reaction molding TPO (R-TPO)+ polyolefin property 体(POP)+ polyolefin elastomer (POE)

this new polyolefin property 体(POP) and elastomer (POE), essence upper is molecular weight non low property low density polyethylene (PE) (VLMW-LLDPE). this material as is polymerization catalytic agent technology 进步 产 material, is used for manufacturing soft packaging film. 近, this property relatively good polyethylene (PE), can as is low cost 橡胶取代 material, used for certain for products requirements how applications: that 不会暴露于极端 temperature degree, pressure, negative or force ring applications. in products 方面, this new material by used for that tool has 一定程 degree property or 触觉感 场 combined. it non is true positive elastomer!

tensile features

tensile features is use elastomer by tensile will has what performance testing value. has types using/adopting experiment/testing, can elastomer in most applications ring will has what performance.

fracture resistant strong/high degree

此 testing value also is resistant strong/high degree. in experiment/testing in, elastomer sheet/slice by tensile fracture, 拉断此材 material force amount by meanwhile 测出. its mono usually is 磅/ 平方英寸(psi) or 兆帕(MPa). resistant strong/high degree high elastomer, ratio testing value relatively low elastomer relatively easy by 拉断.

resistant strong/high degree

resistant strong/high degree experiment/testing methods and fracture resistant strong/high degree experiment/testing basic upper is same. different is, its sheet/slice has 一缺口以 as is expand 展点. testing material by tensile 直至完 full 撕裂, 撕裂此试 sheet/slice force amount by meanwhile 测出. its mono usually is 磅/ 英寸(pli) or 千牛顿/米(kN/m). testing value elastomer resistant property can how to.

tensile 模数

in tensile experiment/testing in, elastomer by tensile series different long degree, its resistant tensile force amount by separation 别测出. testing value usually table/sheet is elastomer versus its long degree and long degree different percentage resistant strong/high degree, in 50%, 100% or 300%时 resistant strong/high degree. elastomer for tensile resistant force in 开始时 can can very strong/high, it long (称 is "颈 shrink ") 而会变 relatively low.

fracture elongation

elongation non is amount tensile material is how to difficult or how to easy, is amount it in fracture front can by tensile more long. fracture elongation by table/sheet is and its long degree percentage. certain soft elastomer in fracture front can by tensile its long degree 1000% above. soft property TPE elongation generally ratio hard rigid property material need high more.

effect/influence testing value factors

试 sheet/slice molding methods and melt flow direction effect/influence its tensile features testing value. therefore, very more elastomer in direction tensile features need by amount

flow direction

如同 elastomer its it many features, tensile features to molding polymer separation orientation effect/influence. therefore, 取决于 tensile is polymer flow direction 进行, also is 沿 横断 direction 进行, tensile features can can has very large 差异.

试 sheet/slice (挤 pressure molding versus for/regarding injection 模塑)

certain experiment/testing is use injection molding sheet/slice 进行, 而另一 experiment/testing is use pressure molding sheet/slice 进行. due to different type type sheet/slice its testing value has 差别, therefore very important is, can for type type sheet/slice testing value comparison.

pressure shrink value is material in temperature degree lower by pressure 变至一定 形状, 并维持一定 time rear 而发生永久 property deformation amount.

usually using/adopting ASTM testing methods (ASTM D395) requirements make material deformation (pressure shrink)达25 %, its 复原30 separation rear again amount sample. usually using/adopting time and temperature degree setting value lower:

+ 23 C (room temperature)

+ 22 small 时, 70 small 时, 168 small (1星期), 1000 small (42 天).

+ 70 C

+ 22 small 时, 70 small 时, 168 small (1 星期), 1000 small (42 天).

+ 121 C

+ 22 small 时, 70 small 时, 168 small (1 星期), 1000 small (42 天).

+ 150 C

+ 22 small 时, 70 small 时, 168 small (1 星期), 1000 small (42 天)

testing value is POM plastics raw materials 材 material sample can to it has high degree percentage. 例如, pressure shrink 变定40% table/sheet 示, thermoplastic property elastomer its by pressure shrink thick degree 之60%. pressure shrink 变定100% 则 table/sheet thermoplastic property elastomer filament milli 未恢复, is 说, it maintain by pressure shrink rear 状态.   pressure shrink easy and creep versus mixed 淆. however, PA66 plastics raw materials pressure shrink is in certain 一恒定 应变 conditions lower deformation amount, creep is in certain 一恒定 应 force conditions lower deformation amount.

suitable temperature degree this 术语, is use large 致 定义 certain types material combined use most high temperature degree.

suitable temperature degree 取决于 many factors, property can requirements, time long short, is has negative in, and parts structure and other.

certain commonly used amount suitable temperature degree methods is: Vicat softening temperature, heat deflection temperature (HDT) (HDT), USA safety testing 实验室(UL) methods, semi resistant strong/high degree or its it patent methods, in industry 而异.

for suitable temperature degree requirements relatively high application has: automotive, 运输, liquid pressure soft tube/pipe and cable and other. for suitable temperature degree requirements high application 实例则 has: generally inner applications, 例如 人养护 use product and device upper 手柄, electrical 话筒连线以 and toys and other.

hardness

in selection thermoplastic property elastomer 时, material hardness is need indicators 之一. hardness and its it important design features has 关, tensile and 挠曲模数. due to various different amount degree, and hardness and its it material features 关系, in hardness can can generate mixed 淆.

hardness amount

测 amount hardness most using/adopting device is 肖氏(also 称邵尔) hardness 计. use elastic will metal pressure pressure material surface, amount it can more deep. device amount deep degree is 零至0.100英寸. upper is 零则意味 pressure 头穿入 极限 deep degree, 而读数 is 100则意味 穿入 deep degree is 零. has various different hardness scope/range and 自动化程 degree hardness 计.

use most 普遍 标 degree is 肖氏A grade degree. 肖氏A grade hardness has relatively pressure and elastic force in and other elastic 簧. 当读数 in 90 above 时, 肖氏A grade hardness 计就变 不 is very 精确. for/regarding type relatively hard material, use 肖氏D grade hardness 计. it has 一 锐利 pressure and elastic force very strong/high elastic 簧, can relatively deep deep degree.

当测 amount more hard plastics 时, use pressure more and elastic force more strong/high iron fluorine 龙 hardness 计, 例如洛氏 hardness 计. in versus 反 另一极端, use 肖氏00 grade hardness 计, amount soft and foam 橡胶.

large more material can 承受住起初 pressure, time 推移, due to creep and 松弛而会屈服. hardness 计 读数 can 即时读取, can in certain 一特定 延迟 time rear, usually is 5至10秒钟 rear 读取. 即时读数总 is 会显示出 ratio 延迟读数 relatively high (or relatively hard) 读数. 延迟读数 not only for material hardness but also for its elastic property 而言, more has table/sheet property. types relatively low, elastic property relatively 差 材 material, ratio that relatively strong/high, relatively has elastic property material more easy creep.

is ensure data has property, need has testing steps. is obtain 精确 读数, must has surface very but also thick parts, pressure 头受支撑 surface effect/influence. usually requirements thick degree is 0.200英寸, for/regarding deformation relatively small hard property material, thick degree relatively thin 时, can testing.

and its it features 关系

hardness 经常会 and its it features mixed 淆, 例如挠曲模数. tube/pipe 两者都反映 product in use in 感觉, 挠曲模数代 table/sheet for 挠曲 抵 resistant can force, hardness table/sheet for pressure 陷 抵 resistant can force. in certain 一特定 TPE series in, this types features is related 联. generally 讲, hardness value increase 时, 挠曲模数也会 increase.

in addition, in 同一TPE series in, resistant creep property and resistant strong/high degree is has 直接关联. this relatively soft TPE发生 creep degree will comparison hard material high, its resistant strong/high degree relatively small. friction coefficient (COF) and hardness formed ratio 关系. 当TPE hardness increase 时, friction coefficient usually decrease small.

当 comparison various different series TPE时, remove hardness outer also need comparison its it material features data, as positive 确 决定.

specialized regulations 术语

USA food and material tube/pipe 理署(FDA)

in USA 联邦政府行政 regulations 汇编第21篇第1章B节 in, detailed USA food and material tube/pipe about/regarding used for food various polymer and composite/compounding material standards. types product by separation is " FDA grade " material 时, that 就说明 its formulation use 经联邦 regulations 第21篇 in 第170－199部 separation 批准 材 material.

full 国卫生基金会 (NSF)

full 国卫生基金会 is in 公共卫生, safety and ring 境保护 field/area made standards, product testing and provide certification machine 构. NSF certification project is USA standards (ANSI/RAB), Netherlands 鉴定委员会(RvA) and add large standards 委员会(SCC)进行资格鉴定.

experiment/testing machine 构联盟允许NSF experiment/testing in world its it by 接受. experiment/testing machine 构联盟 formed 员包括Intertek experiment/testing company (ITS), Netherlands KIWA N.V., add large add large standards 协会(CSA) and quality tube/pipe 理协会(QMI), and Japan gas use tool 检查协会(JIA), and other and other.

requirements NSF certification type application areas has use water, water system, 餐馆服务业, and pipeline and other.

USA 药典(USP)

USA 药典(USP)函 cover/cap liquid and liquid versus and 接触方面 application. USP生 material experiment/testing is is provide polymer container material in material 效应方面 资 material. according to in USP生 material experiment/testing in performance, polymer by separation is and other grade. from 第I至第VI grade increase grade, requirements use ratio front and other grade more more agent for polymer 进行进一步 experiment/testing. another, also has 一 递 increase temperature degree scope/range can selection, to material 进一步定 property.

USA safety testing 实验室(UL) how to reading UL Yellow Card? has UL Yellow Card?

USA safety testing 实验室 is 一 独立, non property product safety and testing certification machine 构. commonly used experiment/testing has UL -94 (separation is HB, V0, V1 or V2 various and other grade and water 平 燃烧 experiment/testing), VTM (film experiment/testing), and VW (垂直线材燃烧 experiment/testing). type application areas 包括手持式 electronics plant/unit, use equipment and electrical appliances.

军 use technology specification (MIL)

certain and non application requirements combined use technology specification. this specification true 菌培养, 火箭操纵 cable, specialized soft 线, lower cable, shipbuilding and between cable and other field/area.

add large standards 协会(CSA)

CSA is add large is certain application made property can standards and testing methods main/primary standards machine 构. it is and USA ASTM, UL, DOT, FDA and MIL similar machine 构.

elastomer usually separation is large type:

+ thermoplastic property

+ hot solid property

structure

thermoplastic property elastomer is this types material, add hot it soft 化 /熔化, in cooling 时则会 hard 化, can 如此反复 变化. large more thermoplastic property plastics solvent 于特定 solvent agent, in 一定程 degree upper can 燃烧. soft 化/熔化 temperature degree polymer types type and specifications 而异. due to thermoplastic property plastics for hot amount and force property, 处理时必 must very small 心, 以避免此材 material degradation, separation understanding or 引燃.

large more thermoplastic property plastics separation can by is 独立, versus in fine 线, Italy strip/profile (见图). add hot 时, strip/profile separation 子链就开始 sliding, formed property flow. cooling 时, and separation also heavy new solid in 一起. rear again add hot 时, separation 子链就 also sliding. thermoplastic property plastics by add hot / cooling cycle has 实际 限 degree, ultra- 该限 degree rear its appearance and mechanical properties will to effect/influence.

hot solid property elastomer in processing 期间经历 chemical 变化, property is non solvent understanding property and non property. positive is this type of chemical crosslinked, formed hot solid property and thermoplastic property system between main/primary difference. through 谓硫化 process to its most property 质 天然橡胶 and combined formed 橡胶, 例如胶乳, 丁腈橡胶, can abrasion polyurethane ester, silicon 胶, 丁基橡胶 and chlorine 丁橡胶, is type hot solid property elastomer.

如 lower 图 示, hot solid property 橡胶硫化 or hard 化时, separation between formed crosslinked, formed complex, versus 联接 网络. this crosslinked anti 止 各 separation sliding, from anti add hot 时 塑 property flow. hot solid property elastomer in crosslinked formed rear, if separation hot, polymer will degradation is 熔化. this type of and 鸡蛋 烹调 has versus 似: 进一步 add hot can make 鸡蛋回 to it liquid 体状态, can by 烧焦.

how to processing methods

positive is thermoplastic property elastomer can by processing features, it excellent hot solid property important features. in processing key/critical property difference lower table/sheet 示.

project thermoplastic property plastics hot solid property 橡胶

manufacturing speed (以秒计) slow (以 separation 计)

边角 material can heavy new utilizing ratio/proportion high

硫化 agent need need

machine 械 常规 thermoplastic property equipment 专门 硫化 equipment

additives less or has more processing additives

design optimization has 限

工 parts heavy new can large can can

hot can can

资 material 源: www.hgdhk.com

TPE ratio hot solid property excellent 越之处:

+ design active. + manufacturing cost relatively low.

+ processing cycle relatively short. + very less or need mixing/compounding. + 边角 material can separation recycling utilizing.

+ product property stability. + can using/adopting blow molding. + can using/adopting hot molding.

+ can consumption relatively low. + processing process relatively simple. + product quality relatively easy control.

+ product density scope/range relatively 广. + most parts mono parts cost relatively low. + relatively has environmental protection.

shrinkage property

当TPE from it 们 熔 melt 状态开始 cooling 时, its separation 子会互 versus 排列, from make 模塑工 parts dimensions comprehensive shrinkage. although this type of shrinkage usually in per mille 之几英寸 scope/range inner, it can significantly effect/influence parts and demolding, and formed product parts appearance.

if shrinkage non-uniform, parts is 平整 工 parts can can 会发生 bending or warpage. in addition, in for 容许公差 requirements comparison application in, material outer shrinkage can can make certain parts and 整 组装 parts 不匹配. therefore, must 事先考虑 to this type of phenomenon.

工 parts demolding

当工 parts has type or 镂空部 separation 时, elastomer shrinkage, it 会紧紧 裹住 mold this 部位, make parts demolding very difficult. mold design, mold surface light slip degree, and processing conditions can decrease light this type of effect/influence, make 自动化 demolding formed is can can.

模塑 conditions

模塑 conditions can significantly effect/influence shrinkage degree and essence. from high force very fast is low force 状态, increase shrinkage degree. parts speed cooling and very high injection speed degree or pressure, can effect/influence shrinkage property. about/regarding conditions is how to effect/influence shrinkage property 进一步资 material, and TPE supply 商联系.

design 方面 考虑

due to shrinkage property, mold must processing ratio parts dimensions large. shrinkage value has and other to specific parts molding can 知. therefore, 事先保守一点总 is most good. has can can 话, can use type mold.

and elastomer its it property 质一样, shrinkage property is polymer flow direction 改变而改变. gate will melt mold direction, from will shrinkage property. again 者, certain TPE ratio its it TPE more is toward property, therefore 也许会 in certain direction shrinkage ratio direction more more. design mold 时, this 一点必 must need 考虑进. about/regarding design 方面 考虑 is how to effect/influence shrinkage property 进一步资 material, and TPE supply 商联系.