Resin Mixers, Polypropylene Tubing & Thermoplastics: JSP Products FAQ

If you manage purchasing for a manufacturing or industrial operation, you've probably had to figure out resin, plastic tubing, and what JSP actually offers more than once. I've been handling this kind of procurement for about five years now, and I still get tripped up on the details. This FAQ covers the questions I hear most often—including a few I wish I'd asked earlier.

What exactly does JSP manufacture?

JSP is a manufacturer of resins and plastic products, specializing in injection molding, extrusion services, and silicone molds. They're also a source for aftermarket replacement plastic parts, which is a niche that saves a lot of headaches if you're maintaining older equipment. Their core offerings include polypropylene (PP) and polyethylene (PE) resins, along with custom molding and extrusion.

I've used them for both raw resin supply and finished replacement parts. The resin quality has been consistent, and the replacement parts—things like plastic knobs, housings, or brackets—have fit without modification. That's not always the case with aftermarket suppliers.

Is resin a thermoplastic?

Yes—most engineering resins are thermoplastics. That includes polypropylene (PP), polyethylene (PE), ABS, and nylon (polyamide). These materials can be melted, cooled, and re-melted, which is what makes injection molding and extrusion possible.

The key distinction: thermoplastics soften when heated and harden when cooled (reversible), while thermosets undergo a chemical change and can't be re-melted. JSP primarily works with thermoplastics for their molding and extrusion services.

I learned this the hard way when I specified a thermoset material for a part that needed to be remolded later. That was a costly mistake—roughly $600 in scrapped tooling. So yeah, verifying this upfront matters.

What should I know about JSP polypropylene plastic tubing?

Polypropylene (PP) tubing is a common product from JSP for fluid handling, pneumatic systems, and structural applications. PP offers good chemical resistance, is lightweight, and can handle higher temperatures than polyethylene (PE). Available sizes typically range from 1/4" to 2" diameter, but custom extrusions are possible.

When sourcing PP tubing from JSP or any supplier, I'd suggest verifying:

• Wall thickness—thin walls flex more but can collapse under vacuum
• Chemical compatibility—PP handles acids and solvents well, but not strong oxidizers
• Temperature range—PP softens around 150°C (302°F), but continuous use at 100°C is safer

We once ordered "standard" tubing that turned out to be a thinner wall than expected. It cracked during installation. The supplier replaced it, but the downtime cost us way more than the tubing itself.

Is ABS plastic strong enough for structural parts?

ABS (acrylonitrile butadiene styrene) is a common thermoplastic used by JSP for injection molded parts. It's strong, rigid, and impact-resistant. For non-load-bearing structural parts—like enclosures, brackets, or housings—ABS is a solid choice. For high-stress applications (like load-bearing beams or high-torque gears), you'd want to look at reinforced materials like glass-filled nylon or polycarbonate.

I went back and forth between ABS and polycarbonate for a machine housing last year. ABS was cheaper and easier to mold, but polycarbonate offered better impact resistance. Ultimately chose ABS because the housing wasn't in a high-impact area, and it saved about 30% on the per-part cost.

What about PET vs PP plastic? Which should I choose?

PET (polyethylene terephthalate) and PP (polypropylene) are both thermoplastics, but they have different properties:

• PET is clearer, stiffer, and has better gas barrier properties (good for bottles and food containers)
• PP is more flexible, more chemical resistant, and can handle higher temperatures

For industrial applications like tubing, containers, or replacement parts, PP is usually the safer bet unless you specifically need clarity or a gas barrier. That's what I've found, anyway. Your specific application may vary.

Here's a rough comparison based on JSP product specs and industry data (Source: Plastics Industry Association, 2024):

• PET tensile strength: ~55-75 MPa
• PP tensile strength: ~30-40 MPa
• PET max service temp: ~70°C (160°F)
• PP max service temp: ~100°C (212°F)

What is a resin mixer, and do I need one?

A resin mixer is a piece of equipment used to blend resin with hardeners, additives, or fillers before molding or casting. For two-part epoxy or polyurethane systems, a resin mixer ensures proper cure and consistent properties.

If you're doing injection molding or extrusion with pre-compounded resin (like the materials JSP supplies), you typically don't need a resin mixer—the compound is ready to use. But if you're mixing your own formulations (adding colorants, flame retardants, or glass fiber), a mixer is essential.

Don't hold me to this, but from what I've seen, a basic industrial resin mixer runs $2,000-8,000 depending on capacity and features. Verify current pricing with equipment suppliers.

This was accurate as of January 2025. Prices change, and equipment availability varies.

How do I buy JSP products directly?

JSP products can be ordered through the JSP store or authorized distributors. For standard items—like polypropylene tubing, plastic sheets, or common resin grades—the online store is the easiest route. For custom injection molding or extrusion, you'll need to contact their sales team with specifications and quantities.

A few things I've learned from ordering custom parts:

• Lead times are typically 4-8 weeks for tooling and first articles
• Minimum order quantities vary—ask before quoting
• Material certifications should be included for critical applications (we request these for any FDA or NSF-related use)

When I first ordered custom parts from JSP in 2023, I didn't ask about MOQ until after the quote came in. That cost me a week of back-and-forth. Now I ask upfront—seriously saves a ton of time.