Toyobo Pelprene®

About Toyobo PELPRENE®

What is PELPRENE?

PELPRENE is the trade name of TOYOBO's thermoplastic polyester elastomer.  PELPRENE is an engineering elastomer having a combination of the features of both rubbers and engineering plastics, eliminating the demarcation between rubbers and engineering plastics.

PELPRENE can be processed using  injection molding, extrusion, blow molding and more., It can be used to make products ranging  from micro-precision parts to thin wide-sheets. Among thermoplastic elastomers (TPE), PELPRENE comes closest to engineering plastics, and has superb reliability.

Types and Grades of PELPRENE

Highly-resilient PELPRENE is classified into several types from general purpose to specialized,  categorized according to the paring of soft and hard segments.

P-Type consists of polybutylene terephthalate as hard segments and aliphatic polymers as soft segments, and has the best balance and flexibly for general purpose use.

S-Type has  physical properties comparable to P-Type, but boasts medium to high hardness as well as higher heat and weather durability.

Please click on images to view larger.    

 

back to top

Features of PELPRENE

1. Comparison of typical features: PELPRENE (P vs. S) vs. TPU vs. TPO

2. Heat-resistant life of PELPRENE (Arrhenius plots)

The heat-resistant life of the typical brands of PELPRENE is shown in the figure below. The heat-resistant life at a given temperature is defined as the elapsed time until the tensile elasticity of each brand is deteriorated to 50% of the initial value in the heat-aging test in high temperatures. The elapsed times reaching 50% tensile elasticity deterioration vs. applied temperatures are shown in this figure.

back to top

Processing of PELPRENE

PELPRENE can be processed through injection molding, extrusion or blow molding using Basic type of molding machines. Also, it can be processed through heating press, melt casting or rotational molding.

PELPRENE molding products are easily treated with finishing touches including coating, printing, vapor deposition, spattering, and heat adhesion.

The pellets of PELPRENE are usually packed into moisture-proof bags after they were dried. Thus they can be processed directly, but for any moisturized pellets due to broken bags or not new ones, please use them after re-drying.

As a guide for drying, the pellets should stay for 4 hours or more in temperatures of 100°C – 120°C.


1. Standard temperature for injection molding of PELPRENE (°C)

Brands P30B˜ P40H P55B˜ P90B
S1001
P150B˜ P280B
S2001˜ S3001
E450B
S6001˜ S9001
Cylinder temperature
1
160-180 190-210 200-230 220-240
2 180-200 200-230 220-240 230-250
3 180-200 200-230 220-240 230-250
Mold temperature 20-40 20-60 20-60 20-60

 

2. Molding shrinkage of PELPRENE

3. Standard temperature for extrusion of PELPRENE

Brands P30B˜ P40H P55B˜ P90B
S1001
P150B˜ P280B
S2001˜ S3001
E450B
S6001˜ S9001
Cylinder temperature
1
160-170 190-200 200-220 220-230
2 180-190 200-220 220-230 230-240
3 180-190 200-220 220-230 230-240

 

4. Standard temperature for blow molding of PELPRENE (°C)

Brands P46D
P55B-07
Cylinder temperature
1
220-230 190-200
2 220-230 200-220
3 220-240 200-220
Mold temperature 20-40 20-60

Molding shrinkage R90A:1.5% P55B-07:2%


5. Reuse of PELPRENE

It is possible to reuse PELPRENE for molding of sprues and runners, etc. In order to get the stabilized quality of molding, mix 30% of sufficiently dried crushed article into the new pellet. Please consult us about the mixing rate of the reuse article, because it depends on the molding condition.

back to top