Application

Typical applications for HV-2fs:

– fiber reinforced plastics
– adhesives
– powder injection molding
– sound damping

Typical Proportion Product data

• Melt viscosity, 100% Polymer Bohlin high temperature viscosimeter

140 °C ~ 4700 Pa·s
160 °C ~ 2600 Pa·s
180 °C ~ 1200 Pa·s
200 °C ~ 600 Pa·s

• Dissolved viscosity in Styrene, Polyvinyl Acetate Solid content Viscosity Brookfield RVT, in styrene 20 RPM, 23°C (PML 002)

20 %  280 mPa·s
30 %  1800 mPa·s
40 %  9900 mPa·s

Food Contact Compliance

EU 10/2011, FDA 175.300, FDA 175.105

Specification

These figures are only intended as a guide and should not be used in preparing specifications.

Typical applications for HV-1:

• Building & Construction Adhesives
• Industrial Adhesives
• Resin Modification
• Resin Modification
• Composites & Molding
• Do It Yourself
• Industrial Coatings

Product data

Melt viscosity, 100% Polymer
Bohlin high temperature viscosimeter

140 °C ~ 4000 Pa•s
160 °C ~ 1500 Pa•s
180 °C ~ 640 Pa•s

Solid content Viscosity Brookfield RVT, in styrene 20 RPM, 23°C (PML 002)

20 % 180 mPa•s
30 % 1100 mPa•s
40 % 5200 mPa•s

According to the taste requirements of each product, each manufacturer heats and mixes it with other raw materials in a certain proportion according to their specific formula, and then uses it as the raw material for making gummy gum base. Becoming a bubbling and chewing part of chewing gum, not to be swallowed.

The macromolecular substances that make up the gumbase are mainly elastomers and polyvinyl acetate. These two types of substances, when combined with other additives, impart appropriate viscoelasticity and plasticity to the gum base, and further combine with chewing gum to achieve appropriate chewiness, film-forming properties, and flavor retention. This article aims to provide a brief explanation of the preparation of gum based gum.

Vinyl Acetate Polymeric resin is a determining factor for some characteristics of chewing gum gum base. It can provide excellent plasticity and chewiness resistance. As a hydrophobic substance, it can also provide certain hydration ability to form a gum base with excellent fragrance and flavor holding ability. Polyvinyl acetate with a polymerization degree below 1000 is the most widely used resin material.

• A Typical Formula of Gumbase

Butyl rubber 16%                      Natural rubber 8%

Polyvinyl Acetate 36%              Vinyl acetate gum 18%

Calcium carbonate 10%          monohard acetic acid oil 8%

Microcrystalline wax 4%

Unless a low-profile additive is used in the manufacture of composite parts, high shrinkage will occur. The addition of our pvac resins (polyvinyl acetate) minimizes this shrinkage to less than 0.05 %, resulting in extremely smooth, homogeneous surfaces.

Nitchen PVAC Resin (polyvinyl acetate) is a most effective thermoplastic anti-shrink (low-profile) additive for UP resin composites that are molded at high temperatures. In addition to zero shrinkage, certain high-temperature unsaturated polyester applications, such as SMC and BMC, require effective thickening to ensure easy handling of the composite and good glass-fiber distribution during mold flow: polyvinyl acetate HV grades, in combination with magnesium oxide or calcium oxide, are the perfect thickening systems for unsaturated resin composites. After maturation, this combination is ideal for preventing exudation of the thermoplastic resins. HV grade vinyl acetate homopolymer grades are used when only moderate or no thickening of the UP resin composite is required.

Benefits of our Polyvinyl Acetate (pvac resin):

• Zero shrinkage/expansion in FRP composites
• Excellent gloss and surface smoothness
• Effective thickening of SMC
• Easy processing and formulating
• Consistently high quality
• Good mechanical properties
• Rapid and complete solubility in styrene