Silicone for making molds

Silicone, is a widely used mold specific material. Silicone rubber has excellent properties and wide applications that cannot be compared to any other silicone rubber mold manufacturers.
At present, the silicone rubber used for mold making is a two-component liquid silicone rubber, divided into two types: condensation type and addition type.
The main components of condensed silicone rubber mold liquid  include: polysiloxane (raw rubber) with hydroxyl end groups and partial side groups, fillers, crosslinking agents, and vulcanization accelerators.
The main components of addition molded silicone rubber include: polysiloxane (raw rubber) with vinyl end groups and some side groups, hydrogen containing silicone oil (crosslinking agent), platinum catalyst (catalyst), and white carbon black (filler).

These two types of mold silicone rubber materials have been widely used in many industries both domestically and internationally. Generally speaking, the tear strength of silicone rubber for condensation type molds is low, and it is easy to tear during mold manufacturing and use, making it difficult to apply to molds with complex patterns and shapes. In the process of manufacturing thick molds with condensed mold adhesive, low molecular weight substances such as ethanol produced during the condensation crosslinking process are difficult to completely discharge, resulting in the degradation and aging of silicone rubber during heating, which significantly affects its service life; At the same time, due to the discharge of low molecular weight substances such as ethanol, the volume of the vulcanizate shrinks. Therefore, condensed mold silicone rubber is mostly used as high-frequency embossing molds in the production of plastics and synthetic leather, or for the manufacturing of some handicrafts with imprecise size requirements. Due to the use of an additive vulcanization system, silicone rubber for addition molding molds does not produce low molecular compounds during vulcanization, resulting in extremely low linear shrinkage. The rubber material can be deeply cured, and has excellent physical, mechanical, and heat aging properties, making it a rapidly developing variety in mold adhesives. Addition molding silicone rubber is suitable for manufacturing precision molds and casting molds, and the mold manufacturing process is simple and does not damage Prototype, good simulation performance.

Characteristics of silicone rubber molds:
1. Silicone rubber has good simulation performance, strength, and extremely low shrinkage rate.
2. The mold making method is simple and feasible, and can be cured at room temperature. Silicone rubber molds have good elasticity and can be directly removed after casting and shaping the concave and convex parts.
3. Silicone rubber molds can withstand repeated use, maintain the prototype of the parts, and can produce products in small batches. Mold modification is also very convenient.
4. Metal inserts and other parts can also be added to the mold, and the finished product can also be electroplated and painted.
5. No need for any release agent (polyvinyl chloride resin products can be smoothly molded thousands of times).
6. High temperature resistance and various acid and alkali substances. Therefore, silicone rubber can be used to make molds in industries such as decorative building materials, arts and crafts, precision casting, fiberglass industry, gypsum, cement products, as well as plumbing seals, polyurethane hard foam decorations, and other industries that require the use of molds.

 COMPANY PROFILE

Shenzhen Hanast Technology Co, Ltd. was established on 2019. The factory is located in Sanming City, Fujian Province,

covering an area of 20,000 square meters.

Hanast is a silicone raw material company integrating R&D, production and sales, mainly engaged in conventional silicone

rubber,special silicone rubber, RTV adhesive sealant, two-component electronic potting adhesive, thermally conductive

silicone, thermally conductive silicone grease, lubricating silicone grease, damping silicone grease, platinum vulcanizing

agent and other silicone raw materials.

The products comply with ROHS standard, obtain SGS, Food Grade Certification, and the enterprise passed ISO9001. 2015

certification. Our products have obtained many national invention patents and utility model patents, and are widely used in

silicone kitchenware, high temperature wire and cable, industrial silicone rollers, medical industry, baby products, sporting

goods, adult products, new energy vehicles and other fields.

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