SORTA-Clear™ 12

SORTA-Clear™ 12

SORTAClear™12是一种优质水白色半透明硅胶(铂金催化剂),可在室温下固化,收缩率可忽略不计。SORTA-Clear™12在12小时内固化,最终邵氏硬度为12A。SORTA-Clear™12具有优异的撕裂强度和拉伸强度。通过切割提取模型时,硅胶清晰度特别有用。
 
SORTA-Clear™硅胶非常适合制作原型、首饰或其他模型可见度很重要的任何结构模具(例如通过切割从模具中提取模型)。材料(如聚氨酯、环氧树脂或聚酯树脂)浇注到SORTAClear™硅胶中,无需使用脱模剂。其他材料如蜡和低熔点金属合金也可浇注到SORTA-Clear™中。SORTA-Clear™可以使用SILC Pig™或Ignite™颜料进行着色。

特征

SORTA-Clear 12使用演示

说明

Safety – Use in a properly ventilated area (“room size” ventilation). Wear safety glasses, long sleeves and rubber gloves to minimize contamination risk. Wear vinyl gloves only. Latex gloves will inhibit the cure of the rubber.
 

Store and use material at room temperature (73°F/23°C). Warmer temperatures will drastically reduce working time and cure time. Storing material at warmer temperatures will also reduce the usable shelf life of unused material. These products have a limited shelf life and should be used as soon as possible.

Cure Inhibition – Addition-cure silicone rubber may be inhibited by certain contaminants in or on the pattern to be molded resulting in tackiness at the pattern interface or a total lack of cure throughout the mold. Latex, tin-cure silicone, sulfur clays, certain wood surfaces, newly cast polyester, epoxy or urethane rubber my cause inhibition. If compatibility between the rubber and the surface is a concern, a small-scale test is recommended. Apply a small amount of rubber onto a non-critical area of the pattern. Inhibition has occurred if the rubber is gummy or uncured after the recommended cure time has passed.

Because no two applications are quite the same, a small test application to determine suitability for your project is recommended if performance of this material is in question.

To prevent inhibition, one or more coatings of a clear acrylic lacquer applied to the model surface is usually effective. Allow any sealer to thoroughly dry before applying rubber. Note: Even with a sealer, platinum silicones will not work with modeling clays containing heavy amounts of sulfur. Do a small scale test for compatibility before using on your project.

Applying A Release Agent - Although not usually necessary, a release agent will make demolding easier when pouring into or over most surfaces. Ease Release™ 200 is a proven release agent for making molds with silicone rubber. Mann Ease Release™ products are available from Smooth-On or your Smooth-On distributor.

IMPORTANT: To ensure thorough coverage, lightly brush the release agent with a soft brush over all surfaces of the model. Follow with a light mist coating and let the release agent dry for 30 minutes.

If there is any question about the effectiveness of a sealer/release agent combination, a small-scale test should be made on an identical surface for trial.


MEASURING & MIXING
Before you begin, pre-mix Part B thoroughly. After dispensing equal amounts of Parts A and B into mixing container, mix thoroughly for 3 minutes making sure that you scrape the sides and bottom of the mixing container several times.After mixing parts A and B, vacuum degassing is recommended to eliminate any entrapped air. Vacuum material for 2-3 minutes (29 inches of mercury), making sure that you leave enough room in container for product volume expansion.


POURING, CURING & MOLD PERFORMANCE

Pouring - For best results, pour your mixture in a single spot at the lowest point of the containment field. Let the rubber seek its level up and over the model. A uniform flow will help minimize entrapped air. The liquid rubber should level off at least 1/2” (1.3 cm) over the highest point of the model surface.

Curing - Allow the material to cure for 12 hours at room temperature (73°F / 23°C) before demolding. Do not cure rubber where temperature is less than 65°F / 18°C.

Time to demold can be reduced with mild heat. IMPORTANT: Rubber will darken considerably when exposed to heat. Note: Allow mold to cool to room temperature before handling.

Smooth-On’s Plat Cat™ platinum silicone accelerator can also be used to accelerate Sorta-Clear 18. See the technical bulletin at www.smooth-on.com.

Post Curing - Post curing the mold will aid in quickly attaining maximum physical and performance properties. After curing at room temperature, expose the rubber to 176°F / 80° C for 2 hours and 212°F / 100° C for one hour. Allow mold to cool to room temperature before using. IMPORTANT: Rubber may darken considerably when exposed to heat.

Using The Mold - New silicone rubber molds exhibit natural release characteristics. Depending on what is being cast into the mold, mold lubricity may be depleted over time and parts will begin to stick. No release agent is necessary when casting wax or gypsum. Applying a release agent such as Ease Release™ 200 (available from Smooth-On) prior to casting polyurethane, polyester and epoxy resins is recommended to maximize mold life. Visit Smooth-On’s FAQ section at www.smooth-on.com for information on a powder coating technique that will yield a dry matte finish to cured castings.

Mold Performance & Storage - The physical life of the mold depends on how you use it (materials cast, frequency, etc.). Casting abrasive materials such as concrete can quickly erode mold detail, while casting non-abrasive materials (wax) will not affect mold detail. Before storing, the mold should be cleaned with a soap solution and wiped fully dry. Two part (or more) molds should be assembled. Molds should be stored on a level surface in a cool, dry environment.

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