Shanghai Daoqin Plastics Co., Ltd.

一, light aging 实验

plastics material made parts in use process in, or more or less 都会面临 light aging issues. in material development process in or 者客户 material selection process in, according to material application requirements, fine evaluation material light aging features.

aging testing

1. experiment/testing principle

UV aging testing used for 模拟由 day 照, and and other gas for material formed poor 化. UVA-340灯 tube/pipe main/primary used for outer cationic light aging, UVA-351则 main/primary used for 透 窗玻璃 cationic light aging.

2. testing standards

can used for GB/T14522, GB/T16422.3, ASTM G154, D4587, ISO11507, ISO 4892-3 and other standards testing.

3. features

模拟 day light 匹配程 degree 不如氙灯 aging, more 经济.

氙灯 aging testing

1. experiment/testing principle

氙灯 resistant aging test is types comprehensive gas experiment/testing plant/unit, remove gas aging test outer, also can polymer/macromolecule material lightfast property testing, polymer/macromolecule material 暴露于模拟透 玻璃 day light light 谱 人造 light lower evaluation material lightfast property can. from light can, temperature degree, drop or 凝露, wet degree this types main/primary gas factors 进行模拟 strong/high experiment/testing.

2. testing standards

can used for ASTMG155, ISO4892-2, GB/T16422.2, PSA D47 1431, SAE J2412, SAEJ2527, VW PV1303, VW PV3929, VW PV3930 and other standards  

二, material viscosity features experiment/testing

plastics material viscosity features, for material molding, products property can and other important. in 实验室 use fine tube/pipe 流变模拟材 material and injection molding, to material processing viscous elastic features. testing used for 指导材 material formulation design and material extrusion and injection molding processing.

毛 fine tube/pipe testing

1. testing principle

材 material in material by add hot melt, material lower 部安装 has specifications fine tube/pipe 口模, temperature degree stability rear, material in 驱动马达 belt/tape lower 以一定 speed degree or 以一定规律变化 speed degree material material from fine tube/pipe types extrusion. meanwhile amount fine tube/pipe 口模入口处 pressure, according to 流变学模 type combined already parameters in different speed rate lower melt viscosity.

2. application

a. testing material viscosity;

b． melt testing;

c．应 force testing;

d．材 material viscous temperature degree testing.

三, chemical resistant product 实验

used for evaluation plastics material for various chemical product, acid, alkali, and other resistant can force. plastics products in rear processing or use process in or more or less 会接触一 chemical product. through chemical resistant product experiment/testing, can understanding various material chemical resistant product features, use in due to chemical resistant product property 引发 风险.

四 separation 之一椭圆 method

1. testing tool and Sample strip/profile

四 separation 之一椭圆治 tool （见 lower 图）, Sample strip/profile is 3.2mm thick ASTM tensile strip/profile （见图2）.

2.样 strip/profile 安装

use strip/profile will 3.0mm thick strip/profile in 椭圆面 upper solid 定.

3. testing steps

a. selection assessment chemical product;

b. will testing chemical product uniform coating in sheet/slice in tool upper outer 露 部 separation;

c.建议同一组样 strip/profile testing 五组, coating chemical product rear 静止存放（ ring requirements 23℃, 50%RH）, testing time according to 实际情况自定.

  ε0={0.139(1-0.0000617X2)-3/2}T×100

  its in:

  ε0临界应变（%）;

  X from 椭圆心开始 to 临界点 距离（mm）;  

  T  experiment/testing sheet/slice thick degree （mm）

  a 四 separation 之一椭圆治 tool long 轴（120mm）

  b 四 separation 之一椭圆治 tool short 轴（40mm） 

4.结果 analysis  

（图2）

W strip/profile wide degree 12.7mm;

L strip/profile long degree 127.0mm;

H 样 strip/profile thick degree  3.0mm

四, analysis 实验

using/adopting ring oxygen solid technology, for product 指定位置进行剖面观察 analysis. can used for plastics made parts surface treatment defect issues analysis, material filling material dispersion distribution and other.

断面 analysis

1. testing steps

a.取样: according to Sample 实际情况, need 观察部 separation, 以备镶样. 截取时应 and 观察断面位置保留一定距离, anti 止改变 or bad 观察位置断面 原始形态.

b.镶样: use di 面胶, will sample need 观察 断面朝 upper, solid in made container inner. rear 浇注两 versus ring oxygen resin full sample. （见 lower 图）

c. abrasion 抛: ring oxygen resin solid rear, from made container in ring oxygen resin block. use coarse abrasion sample need 观察 位置, rear for 观察面进行精抛处理, sample surface has is 止. abrasion process in using/adopting water cooling, anti scratch hot temperature degree high bad sample.

d.观察: abrasion formed, can use various analysis device for 断面进行观察, analysis and other. （如 lower 图）

2. precautions

a.应 attention/notes ring oxygen resin and solid agent ratio/proportion, in 镶样时 resin need uniform, in front 静止一段 time 以利于 bubbles troubleshooting.

b．因 resin solid time relatively long, need ensure sample solid, anti sample in resin in slip, 不利于 rear abrasion 抛观察.

五, hot 停留实验

材 material in molding 时, in in time increase, can can 会发生材 material degradation, from effect/influence to material mechanical properties and injection molding product appearance and other. methods is due to assessment time and material material property, made parts appearance and other property can between 关系.  

hot front rear material property comparison

1. experiment/testing methods

 a.首先 according to positive conditions injection molding material property Sample strip/profile （ can according to need injection molding ASTM, ISO, DIN and other standards strip/profile ）.

 b. in injection molding process lower, separation let material in injection molding machine in 停留5min, 10min, 15min, 20min（停留 time can according to 实际情况 setting ）, 每次停留完 injection molding 一模, 两次停留 between need machine 处理.

2. testing

according to different strip/profile using/adopting versus for testing standards testing, comparison time for material various mechanical properties parameters effect/influence.  

hot degradation silver streaks

1. experiment/testing methods

  in solid injection molding process lower injection molding high light color sheet/plate, separation let material in injection molding machine in 停留5min, 10min, 15min, 20min（停留 time can according to 实际情况 setting ）, 每次停留完 injection molding 一模, 两次停留 between need machine 处理.

hot high light sheet/plate silver streaks large sheet/slice  

PC/ABS mixed combined structure

2.判断 based on

观察 different time lower, high light color sheet/plate 发雾, silver streaks, color and other and other phenomenon 情况, from 而知道材 material hot time and material appearance 变化关系 情况.