塑料外墙挂板采用的聚氯乙烯凉鞋选用的聚氯乙烯树脂多以SG2型
SG3型树脂为主,也有使用SG-4型、SG-5型聚氯乙烯的,这主
要取决于性能要求。对于聚氧乙烯树脂指标,一般要求表观密度稍
小,增塑剂吸收量较高,“鱼眼”少,粒径均一。透明料还要求树
脂杂质粒子少,热稳定性好
(12)人造革聚氯乙烯人造革根据生产工艺不同,通常使用
悬浮树脂或乳液树脂。采用涂種法生产工艺需预制成增溶胶,主
要使用乳液树脂。采用压延法或层合法生产工艺需预制成薄膜或片
材,使用悬浮树脂。通常人造革中采用乳液聚合法或悬浮聚合法制备

的细颗粒分散型树脂。树脂的分子量、粒度及颗粒形状对人造革
的性能有很大的影响。(是
聚合度的选择可根据人造革性能要求和加工条件而定。乳液法
树脂聚合度一般选用1000~1400,悬浮法树脂选用800~1200。人
造革用聚氯乙烯树脂一般要求颗粒大小均匀,增塑剂吸收性好,杂
质粒子少,挥发分低,“鱼眼”少。
糊黏度是聚氯乙烯人造革主原料的又一重要指标。生产柔软人
造革(增塑剂含量多)应选择糊黏度较高的聚氯乙烯树脂;生产较
硬人造革(增塑剂含量少)时,应选择糊黏度低的聚氯乙烯树脂。

Plastic exterior wall hanging board using PVC sandals polyvinyl chloride resin selection to SG2

SG3 resin based, but also use sg-4, sg-5 polyvinyl chloride, this main

It depends on performance requirements.For polyoxyethylene resin index, the general requirements of the apparent density

Small, plasticizer absorption is higher, "fish eyes" less, uniform particle size.Transparent materials also require trees

The fat impurity particle is few, the heat stability is good

(12) artificial leather PVC artificial leather according to the production process, usually used

Suspended resin or emulsion resin.Application of coating method production process needs to be prefabricated into sol, the main

Use emulsion resin.Prefabricated films or sheets are required for calendering or layering processes

Wood, using suspended resin.Usually in the artificial leather USES the emulsion polymerization method or the suspension polymerization method to prepare the fine particle dispersant resin.Molecular weight, particle size and particle shape of resin on artificial leather

Performance has a big impact.(is

The degree of polymerization can be chosen according to the performance requirements and processing conditions of artificial leather.The emulsion method

Resin polymerization degree generally selected 1000~1400, suspension resin selection 800~1200.people

Making leather with PVC resin generally requires uniform particle size, plasticizer absorption, miscellaneous

Less mass particles, low volatile content, "fish eyes" less.

Paste viscosity is another important index of main raw material of PVC artificial leather.Produce soft people

Leather (plasticizer content more) should be selected paste viscosity of higher PVC resin;Production is

Hard artificial leather (plasticizer content is low), should choose the paste viscosity of PVC resin.