New Product Launch: DEMI 4000 Resin Removal Solution

PostProcess Technologies has once again revolutionized resin removal for additive manufacturing. Leveraging proven submersion technology, the DEMI 4000™ is the world’s only large scale software-driven 3D post-printing solution for high-volume stereolithography (SLA) production. Read on to learn what sets it apart.

Powered Lift System (Key Benefits – Safety and Ease of Use)

The DEMI 4000’s powered lift system allows for automatic lowering and heightening of tray loads. This ergonomic feature saves floor space and messy bath transfers by eliminating the need for multiple machines, and allows for same-height loading of multiple build trays and consistent, operator-free processing.

Large Processing Tank (Key Benefits – High Volume Production)

Measuring 890mm x 890mm x 635mm, the DEMI 4000’s tank is designed to hold 275 gallons of resin removal chemistry. At this size, the tank can handle heavy loads of parts at one time, effectively increasing throughput and improving cycle times for all part sizes. Additionally, as a fully-enclosed system with a ventilation port, the DEMI 4000 ensures safety for operators and manages the work environment to control fumes and contain resin and detergent.

AUTOMAT3D™ Software Control (Key Benefits – High Volume Production)

AUTOMAT3D™ software takes the guesswork out of post-printing and reduces operator labor time with pre-programmed recipes. The software controls the agitation intensities, temperatures, process times, and more to deliver consistently complete resin removal. AUTOMAT3D optimizes the rate of resin removal with advanced ultrasonics, an advanced  pumping scheme, as well as heat and variable fluid flow. The system was designed with optimal operator ergonomics including multi-touch HMI with glass screen and stainless steel wash-down control buttons and interface panel.

Additive Formulated Chemistry (Key Benefits – Longevity, Cycle Times)

PostProcess offers a comprehensive suite of detergents, each uniquely optimized for post-processing of numerous resins from various manufacturers. This extends to specialized applications such as ceramic-filled resins and high-temp resins.

Our newest generation of detergent was found to have better longevity than all typical solvents (e.g. IPA, TPM, DPM), and an exceedingly safe flashpoint over 200°F / 93°C. This equates to less frequent chemical change-outs, improved environmental friendliness, and compliance with regulatory requirements.

Printer Alignment

For reference, the DEMI 4000 aligns with the following large SLA printers:

  • 3DS ProX 800
    • Max build envelope: 6” x 29.5” x 21.6”  (650mm x 750mm x 550mm)
  • RPS NEO800
    • Max build envelope: 5” x 31.5” x 23.6” (800mm x 800mm x 600mm)
  • SSYS V650
    • Max build envelope: 20” x 20” x 23” (508mm x 508mm x 584mm)

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We are thrilled to announce you that Lino3D will participate in the upcoming ADDITIV DIGITAL WORLD 2020, a virtual event organized and held by 3Dnatives.

ADDITIV is a series of virtual global events dedicated to Additive Manufacturing, offering panel discussions with AM experts from leading industrial companies & networking sessions with the most innovative firms in the field.

3Dnatives is the largest international online media platform on 3D printing and its applications. With its in-depth analysis of the market, 3Dnatives gets over 1 million unique visitors per month and is currently available in English, French, Spanish, and German.

On the 22nd of October, we will meet you at our virtual booth on the 5th floor, table 7 from 15:00 till 01:00 EEDT.

Do not forget to register!

And of course, check the event’s agenda!

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Desktop Metal to become public, creating the only listed Pure-Play Additive Manufacturing 2.0 Company

  • Desktop Metal is a leader in mass production and turnkey additive manufacturing solutions, offering the fastest metal 3D printing technology in themarket, up to 100x the speed of legacy technologies(1)
  • The additive manufacturing industry is estimated to growfrom $12billionto $146billionthis decadeas it shifts from prototyping to mass production
  • Desktop Metal to become publicly listed through a business combination with Trine (NYSE:TRNE)
  • Combined company to have an estimated post-transaction equity value ofup to$2.5billionand will remain listed onthe NYSE under the ticker symbol “DM” following expected transaction closein the fourth quarter of 2020
  • Transaction to provide up to $575millionin gross proceeds, comprised ofTrine’s $300millionof cash held in trust (assuming no redemptions) and a $275M fullycommitted common stock PIPE at $10.00 per share, including investments from Miller Value Partners, XN, Baron Capital Group, Chamath Palihapitiya, JB Straubel, and HPS Investment Partners
  • Leo Hindery, Jr., legendary technology investor and operator, to join Desktop Metal’s board
  • All significant Desktop Metal shareholders including, Lux Capital, NEA, Kleiner Perkins, Ford Motor Company, GV (formerly Google Ventures), and Koch Disruptive Technologies will retain their equity holdings through Desktop Metal’s transition into the publiclylisted company

BOSTON, MA (August 26, 2020)–Desktop Metal, Inc. (“Desktop Metal” or the “Company”) a leader in mass production and turnkey additive manufacturing solutions, announced today it will become a publicly listed company in order to accelerate its growth trajectory within the rapidly growing additive manufacturing market and capitalize on the strong secular tailwinds supporting the reshoring of manufacturing and supply chain flexibility. The Company has signed a definitive business combination agreement with Trine Acquisition Corp. (NYSE:TRNE), a special purpose acquisition company led by Leo Hindery, Jr., and HPS Investment Partners, a global credit investment firm with over $60 billion in assets under management.Upon closing of the transaction, the combined operating company will be named Desktop Metal,Inc. and will continue to be listed on the New York Stock Exchange and trade under the ticker symbol “DM.”

The additive manufacturing industry grew at a 20 percent annual compound rate between 2006 and 2016 before accelerating to 25 percent compound annual growth over the last 3years, a rate that is expected to continue over the next decade as the market surges from $12 billion in 2019 to an estimated $146 billion in 2030. This market inflection is being driven by a shift in applications from design prototyping and tooling to mass production of end-use parts, enabled by the emergence of what Desktop Metal refers to as “Additive Manufacturing 2.0,” a wave of next-generation additive manufacturing technologies that unlock throughput, repeatability, and competitive part costs. These solutions feature key innovations across printers, materials, and software and pull additive manufacturing into direct competition with conventional processes used to manufacture $12 trillion in goods annually.

Desktop Metal’s cash on hand after giving effect to the transaction will enable the Company to capitalize on its position at the forefront of Additive Manufacturing 2.0 by accelerating the Company’s rapid growth and product development efforts. The Company will also use the proceeds to support constructive consolidation in the additive manufacturing industry.

Led by an experienced team with deep operational and scientific pedigree, Desktop Metal has distribution in more than 60 countries around the world and broad adoption from leading companies spanning array of industries,including automotive, consumer products, industrial automation, medical devices, and aerospace & defense.

Desktop Metal is ready to rapidly deploy its full suite of additive manufacturing solutions to existing and new customers on a global basis. The Company’s broad product portfolio includes the Studio System™, an office-friendly metal 3D printing system for low volume production, which has been shipping in volume for more than a year, as well as the new Shop System™ for mid-volume manufacturing and its continuous fiber composite printer, Fiber™, both of which are expected to ship in the fourth quarter of 2020. The Company’s Production System™, which has begun shipping to early customers and is expected to ship in volume in the second half of 2021, is designed to be the fastest way to 3D print metal parts at-scale, achieving print speeds up to 100x faster than legacy technologies and delivering thousands of parts per day at costs competitive with traditional manufacturing.

“We are at a major inflection point in the adoption of additive manufacturing, and Desktop Metal is leading the way in this transformation,” said Co-founder, Chairman & Chief Executive Officer of Desktop Metal, Ric Fulop. “Our solutions are designed for both massive throughput and ease of use, enabling organizations of all sizes to make parts faster, more cost effectively, and with higher levels of complexity and sustainability than ever before. We are energized to make our debut as a publicly traded company and begin our partnership with Trine, which will provide the resources to accelerate our go-to-market efforts and enhance our relentless efforts in R&D.”

Leo Hindery, Jr., Chairman & Chief Executive Officer of TRNE added, “After evaluating more than 100 companies, we identified Desktop Metal as the most unique and compelling opportunity, a company that we believe is primed to be the leader in a rapidly growing industry thanks to their substantial technology moat, deep customer relationships across diverse end-markets, and impressive, recurring unit economics. Ric has put together an exceptional team and board of directors with whom we are excited to partner to create the only publicly traded pure-play Additive Manufacturing 2.0 company.”

 Tom Wasserman, Director of TRNE and Managing Director of HPS Investment Partners added, “We are thrilled to partner with Ric and Desktop Metal to help the Company achieve its goals and capture the massive Additive Manufacturing 2.0 opportunity. Thanks to its tremendous team, we believe Desktop Metal has incredible potential for future growth, which will only be accelerated by the extensive financial resources provided by this transaction.”

Transaction Overview

Pursuant to the transaction, TRNE, which currently holds $300 million in cash in trust, will combine with Desktop Metal at an estimated $2.5billion pro forma equity value. Assuming no redemptions by TRNE’s existing public stockholders, Desktop Metal’s existing shareholders will hold approximately 74percent of the issued and outstanding shares of common stock immediately following the closing of the business combination.

Cash proceeds in connection with the transaction will be funded through a combination of TRNE’s cash in trust and a$275millionfully committed common stock PIPE at $10.00 per share, including investments from funds and affiliates of Miller Value Partners, XN, Baron Capital Group, Chamath Palihapitiya, JB Straubel, and HPS Investment Partners.

The boards of directors of both Desktop Metal and TRNE have unanimously approved the proposed transaction. Completion of the proposed transaction is subject to approval of Trine and Desktop Metal stockholders and other closing conditions, including a registration statement being declared effective by the Securities and Exchange Commission, and is expected to be completed in the fourth quarter of 2020.

Additional information about the proposed transaction, including a copy of the merger agreement and investor presentation, will be provided in a Current Report on Form 8-K to be filed by TRNE today with the Securities and Exchange Commission and available at


Credit Suisse is serving as the exclusive capital markets advisor to Desktop Metal and as sole private placement agent to TRNE. BTIG, LLCis serving as financial and capital markets advisor to TRNE. Latham & Watkins LLP is serving as legal advisor to Desktop Metal, and Paul,Weiss, Rifkind, Wharton & Garrison LLPis serving as legal advisor to TRNE. ICR is serving as investor relations and communications advisor to Desktop Metal.

Investor Conference Call

Desktop Metal and TRNE will host a joint investor conference call to discuss the business and the proposed transaction today, August 26, 2020, at 8:00 AM ET. To listen to the conference call via telephone, dial 1-877-407-4018 or 1-201-689-8471 (international callers/U.S. toll) and enter the conference ID number 13708990. To listen to the webcast, please click here. A replay of the call will be accessible at the webcast link.

For Desktop Metal investor relations website,visit

About Desktop Metal

Desktop Metal, Inc., based in Burlington, Massachusetts, is accelerating the transformation of manufacturing with an expansive portfolio of 3D printing solutions, from rapid prototyping to mass production. Founded in 2015 by leaders in advanced manufacturing, metallurgy, and robotics, the company is addressing the unmet challenges of speed, cost, and quality to make Additive Manufacturing an essential tool for engineers and manufacturers around the world. Desktop Metal was selected as one of the world’s 30 most promising Technology Pioneers by the World Economic Forum and named to MIT Technology Review’s list of 50 Smartest Companies.

For more information, visit

About Trine Acquisition Corp

Trine Acquisition Corp is a blank check company organized for the purpose of effecting a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization, or other similar business combination with one or more businesses or entities.

For more information, visit

Forward Looking Statements

This document contains certain forward-looking statements within the meaning of the federal securities laws with respect to the proposed transaction between Desktop Metal, Inc. (“Desktop”) and Trine Acquisition Corp. (“Trine”), including statements regarding the benefits of the transaction, the anticipated timing of the transaction, the services offered by Desktop and the markets in which it operates, and Desktop’s projected future results. These forward-looking statements generally are identified by the words “believe,” “project,” “expect,” “anticipate,” “estimate,” “intend,” “strategy,” “future,” “opportunity,” “plan,” “may,” “should,” “will,” “would,” “will be,” “will continue,” “will likely result,” and similar expressions. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties. Many factors could cause actual future events to differ materially from the forward-looking statements in this document, including but not limited to: (i) the risk that the transaction may not be completed in a timely manner or at all, which may adversely affect the price of Trine’s securities, (ii) the risk that the transaction may not be completed by Trine’s business combination deadline and the potential failure to obtain an extension of the business combination deadline if sought by Trine, (iii) the failure to satisfy the conditions to the consummation of the transaction, including the adoption of the agreement and plan of merger by the shareholders of Trine and Desktop, the satisfaction of the minimum trust account amount following redemptions by Trine’s public shareholders and the receipt of certain governmental and regulatory approvals, (iv) the lack of a third party valuation in determining whether or not to pursue the proposed transaction, (v) the occurrence of any event, change or other circumstance that could give rise to the termination of the agreement and plan of merger, (vi) the effect of the announcement or pendency of the transaction on Desktop’sbusiness relationships, performance, and business generally, (vii) risks that the proposed transaction disrupts current plans of Desktop and potential difficulties in Desktop employee retention as a result of the proposed transaction, (viii) the outcome of any legal proceedings that may be instituted against Desktop or against Trine related to the agreement and plan of merger or the proposed transaction, (ix) the ability to maintain the listing of Trine’s securities on the New York Stock Exchange, (x) the price of Trine’s securities may be volatile due to a variety of factors, including changes in the competitive and highly regulated industries in which Desktop plans to operate, variations in performance across competitors, changes in laws and regulations affecting Desktop’s business and changes in the combined capital structure, (xi) the ability to implement business plans, forecasts, and other expectations after the completion of the proposed transaction, and identify and realize additional opportunities, and (xii) the risk of downturns in the highly competitive additive manufacturing industry. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of Trine’s Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, the registration statement on Form S-4 and proxy statement/consent solicitation statement/prospectus discussed below and other documents filed by Trine from time to time with the U.S. Securities and Exchange Commission (the “SEC”). These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements.Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and Desktop and Trine assume no obligation and do not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. Neither Desktop nor Trine gives any assurance that either Desktop or Trine will achieve its expectations.

Additional Information and Where to Find It

This document relates to a proposed transaction between Desktop and Trine. This document does not constitute an offer to sell or exchange, or the solicitation of an offer to buy or exchange, any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, sale or exchange would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Trine intends to file a registration statement on Form S-4 that will include a proxy statement of Trine, a consent solicitation statement of Desktop and a prospectus of Trine. The proxy statement/consent solicitation statement/prospectus will be sent to all Trine and Desktop stockholders. Trine also will file other documents regarding the proposed transaction with the SEC. Before making any voting decision, investors and security holders of Trine and Desktop are urged to read the registration statement, the proxy statement/consent solicitation statement/prospectus and all other relevant documents filed or that will be filed with the SEC in connection with the proposed transaction as they become available because they will contain important information about the proposed transaction.

Investors and security holders will be able to obtain free copies of the proxy statement/consent solicitation statement/prospectus and all other relevant documents filed or that will be filed with the SEC by Trine through the website maintained by the SEC at In addition, the documents filed by Trine may be obtained free of charge from Trine’s website at or by written request to Trine at Trine Acquisition Corp., 405 Lexington Avenue, 48th Floor, New York, NY 10174.

Participants in the Solicitation

Trine and Desktop and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from Trine’s stockholders in connection with the proposed transaction. Additional information regarding the interests of those persons and other persons who may be deemed participants in the proposed transaction may be obtained by reading the proxy statement/consent solicitation statement/prospectus regarding the proposed transaction. You may obtain a free copy of these documents as described in the preceding paragraph.

Press Contacts

For Desktop Metal Investor / Media Relations

Lynda McKinney

Investor Relations

Mike Callahan / Tom Cook

For Trine Acquisition Corp.

Pierre Henry

For HPS Investment Partners

Prosek Partners

Mike Geller / Josh Clarkson /

# # #

(1)Based on published speeds of binder jetting and laser powder bed fusion systems comparable to the Production System™ available as of August 25, 2020and using comparable materials and processing parameters.

Please do read and download the original Press Release by Desktop Metal here.

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Desktop Metal receives multi-million dollar award to mass produce cobalt-free hardmetal parts

Metal 3D printing company Desktop Metal has been awarded a three-year $2.45 million dollar project from the U.S. Department of Defense (DoD) to develop a high-volume 3D printing process for the mass production of Cobalt-free hardmetals.

Desktop Metal’s proprietary Single Pass Jetting (SPJ) technology will be used to mass manufacture the cobalt-free hardmetal parts, made from a novel, iron-based nano material, at a rate of 200,000 parts from a single machine, per day.

“The novel Co-free hardmetal grade is expected to yield a high strength, high toughness, high hardness, and high wear resistance material,” said Dr. Nicholas Ku, materials engineer at CCDC Army Research Laboratory (ARL). “We believe combining this novel material with Desktop Metal’s Single Pass Jetting technology will have major applications not only in the defense sector but also in the commercial sector.

“Further, we believe this combined method will dramatically improve sustainability, reduce the use of a conflict mineral and provide an environmentally-friendly process to mass produce parts with superior properties.”

Desktop Metal’s SPJ technology 

The Desktop Metal Production System is a large scale machine which utilizes SPJ technology – an inkjet and powder-based method of metal 3D printing. In comparison to conventional binder jetting methods, which use multiple carriages and pass over a build box to print each layer, Desktop Metal’s patent-pending bi-directional SPJ technology consolidates these steps into the motion of a single print carriage. This significantly reduces print time and removes unnecessary steps to increase the Production System’s mechanical efficiency.

In fact, the company claims the Production System can achieve print speeds up to 100 times those of legacy powder bed fusion 3D printing technologies.

Chicago-based advanced digital manufacturing company Fast Radius was one of the first companies to receive Desktop Metal’s Production System in 2019, as it looked to further expand its global metal additive capabilities. Shortly after, Ford Motors also integrated the Production System to accelerate prototyping and manufacture limited scale production parts, after leading a $65 million investment round for the firm.

Most recently, Desktop Metal merged with blank check company Trine Acquisition Corp to go public with its 3D printing business, a move which will see it listed on the NYSE with an estimated equity value of $2.5 billion. Following the announcement, 3D Printing Industry investigated what this transaction could mean for the wider additive manufacturing industry.

The Desktop Metal Production System, equipped with SPJ technology. Image via Desktop Metal.

Mass manufacturing cobalt-free hardmetals

Cobalt is a naturally occurring element typically used as a metallic binder material for cemented tungsten carbide. While a critical component in items such as lithium-ion rechargeable batteries, Cobalt has also been linked with negative respiratory and dermal side effects, particularly to those who are mining it. The mining of Cobalt also poses environmental issues, such as increased radioactivity levels and polluted rivers and drinking water.

The ARL has therefore been investigating a replacement for Cobalt, culminating in the development of a patented cobalt-free hardmetal material that uses a novel iron-based nano material as its matrix.

Once the material had been developed, the U.S. Army Contracting Command tasked Desktop Metal with providing a cost-effective, high volume process able to print the novel hardmetals, on behalf of U.S. Army Research Laboratory to the National Center for Manufacturing Sciences (NCMS) and the Advanced Manufacturing, Materials and Processes (AMMP) consortium.

During the project, Desktop Metal will develop a feedstock and binder system for the cobalt-free hardmetal. Without the use of tooling, the firm’s SPJ process will print the novel hardmetals into complex, net, or near-net shaped parts. The goal of the project is to print at least 200,000 parts per day from a single machine.

Desktop Metal will also deliver a cost analysis to step up its SPJ technology for the manufacture of at least 500,000 prototype parts. The company believes its SJP process will “lead the development” of a dual-use technology suitable to various commercial and DoD applications.

Desktop Metal’s decision to go public could raise it $575 million in additional funding. Image via Desktop Metal.

The carbide hardmetals sector

According to Desktop Metal, the carbide hardmetals market is projected to grow to $24 billion by 2024. Carbide hardmetals are used in multiple dual use applications spanning sectors including oil and gas, chemical and textile, agricultural tools, aerospace, defense, construction, and more.

Dr. Animesh Bose, vice president of Special Projects at Desktop Metal, will serve as principal investigator of the three-year project. A fellow of ASM International and APMI International, Bose has amassed 40 years’ experience in processing particulate materials.

“The success in this project will not only provide the hardmetal community with their eagerly desired Co-free hardmetal solution, but also result in the development of a tool-free processing technique capable of fabricating this class of materials into extremely complex shaped parts at speeds that can rival most other high-volume manufacturing techniques, opening op new horizons in the area of hardmetals and its applications,” he said.

It’s expected by the relevant parties that this project will aid in providing a more environmentally friendly way to mass produce metals, alloys, and other composite parts for both DoD and commercial applications.

Dr Animesh Bose will serve as principal investigator of the three-year project. Image via Desktop Metal.

Please do read the original article by Hayley Everett here.

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Application Note: Chemistry Advancements for Automated Resin Removal: PLM-403-SUB


I. Summary
II. Testing & Validation of SLA Resin Removal Solution
III. Conclusion

This paper examines PostProcess Technologies’ newly released resin removal chemistry, PLM-403-SUB (referred to as 403 from here on), as part of its comprehensive Automated Resin Removal Solution. It will review the effectiveness across a range of materials, safe operations, and process optimizations as compared to traditional alternatives isopropyl alcohol (IPA) and tripropylene glycol monomethyl ether (TPM).

The goal of the new 403 chemistry is to, in concert with the software and hardware components of the resin removal solution, ease the multiple burdens that typically arise when removing uncured resin following various Vat Photopolymerization processes. With this solution, users can dramatically reduce cycle times, process steps, and the typical operational risk factors that come with legacy resin removing solvents.

The PostProcess 403 chemistry is a new formulation that improves upon the performance of the previously released PLM-402 SUB (referred to as 402 from here on). The primary benefits of the solution are the same as those identified previously with the 402 detergent, including industry-leading cycle times and reduction of required process steps. Unlike previous methods which may have required both TPM and dirty IPA baths followed by various rinse steps, cycle times with 403 in PostProcess’s patented hardware technology are frequently less than 10 minutes. Additionally, the process takes place within just one piece of equipment. This effectively cuts down on both attended and unattended process time. The user can simply load and unload from the system, and perform a quick rinse before moving to the post-cure step. This is compared to cycle times of 20+ minutes in multiple TPM/IPA baths which involve operator intervention throughout the cycle to move from one step to the next.

The 403 chemistry has been successfully used to remove uncured resin from the model materials listed in Table 1 (as of publication date noted in the footer). Ongoing validation tests for additional resins are being conducted with the intention of covering the vast majority of resins available, and will be updated periodically in this document available on the
PostProcess website.

One of the most important factors for users, after ability to clean parts, is the detergent life, or longevity. This typically determines the frequency of labor-intensive equipment cleaning efforts. Longevity for resin removal detergent is typically defined as the amount by weight that the chemical solution can hold and still effectively remove resin. As most users look to remove resin as quickly as possible, the longevity of various solvents are compared while holding 10 minute cycle times. From the data depicted in Figure 1 and in Table 2, 403 has significantly better longevity (capacity by weight of resin in solution at 10 minutes) than all other typical solvents (i.e., IPA, DPM, TPM) used to remove uncured resin from printed parts. Likewise, 403 has 6% improved longevity versus PostProcess’s previously released industry- leading chemistry, 402.

Figure 1: Saturation of various chemical solvents for resin removal

The saturation of the 403 chemistry with removed resin can be measured using the hydrometer (see Figure 2 and Table 3 below), which is provided with every PostProcess Automated Resin Removal Solution.

FIGURE 2: Hydrometer

Due to its increased longevity, 403 offers a significant reduction in waste generation compared to other solvents. Subsequently, the lower frequency of chemistry changeouts reduces the required maintenance labor hours in the process.

The detergents used in the resin removal process will also contain the uncured resins in solution. These resins do not become less hazardous after removal, and are all considered hazardous materials in the chemicals used to remove them. The frequency and volume of waste disposal will be a factor in the total cost to dispose of the exhausted chemicals.

An initial set of tensile testing has been conducted to show mechanical property integrity compared to existing solvent cleaning methods. Accura ClearVue, Accura 60, and Accura Extreme Grey were all subjected to a resin removal process using 403 and IPA, along with a control group in which the uncured resin was carefully wiped off. Following these procedures, all tensile bars underwent a curing step according to manufacturer recommendations. Key properties have been compared below.

As shown above, tensile strength at yield is within 5% of the control group for both 403 and IPA processed parts. Values for tensile at break are also nearly identical for 403 and IPA. While elongation varies slightly, it still lies within the manufacturer specifications (3-15% for ClearVue, 5-13% for 60, and 14-22% for Extreme Grey) for both 403 and IPA. In summary, when moving from an IPA cleaning process to the PostProcess solution utilizing the 403 chemistry, mechanical properties will not be significantly affected.

Inhalation and combustion risks during the resin removal process are a widespread concern for all resin removal users. Additionally, regulations can significantly limit the amount of combustible resin removal liquids that can be stored on site in a facility. The 403 chemistry has improved safety and environmental characteristics that address these issues, as seen in Table 5 below.

The high flash point of 403 (220°F, 104.4°C) means far less vapor will end up in the air near the machine, especially when compared to a volatile solvent like IPA. With typical process temperatures ranging from ambient temperatures (75 – 85°F, 23.9 – 29.4°C) up to 120 – 130°F (48.9 – 54.4°C) for the PostProcess Resin Removal Solution, there is still a very large gap before reaching the ¼ LEL temperature of 163°F (72.8°C).

For higher volume resin removal, where large volumes of chemical are required to remove the resin, 403 addresses storage limitation issues with flammable liquids.

The amount of flammable/combustible resin removal liquids that can be kept on-site is limited by various regulations. Liquids with a flashpoint below 200°F (93.3°C) are usually limited to 120 gallons (454 L). Conversely, liquids with a flashpoint greater than 200°F (93.3°C) can usually be stored in quantities up to 13,200 gallons (5000 dekaliters). Because 403 has a flashpoint of 220°F (104.4°C), it can operate and be stored in much larger quantities than other resin removal chemistries, as summarized in Table 6. Table 6 is specific to the United States. Please refer to your local regulations when outside of the US.

The new 403 chemistry is an environmentally-friendly alternative. It has a much lower vapor pressure than other solvents, and a 220°F (104.4°C) flashpoint that makes it much safer to use. In 402, D-limonene was used to help with resin removal. Although generally safe to use, it has been replaced in 403 with a more environmentally-friendly option that reduces risks following the waste removal step.

Once saturated with resin, 403 can be recovered for reuse by distillation. Under a typical vacuum distillation, up to 90%+ of 403 by saturation weight (amount of resin in solution) can be recovered for reuse of the detergent. This makes 403 a particularly sustainable option.

With reduced waste generation, lower vapor pressure, and higher flashpoint than any other option on the market, the 403 chemistry is the most sustainability-friendly solution available.

PostProcess Technologies’ new 403 chemistry as a part of its comprehensive Automated Resin Removal Solution is a definitive improvement over current mechanical and chemical technologies used to remove resin in Vat Photopolymerization 3D post printing. Through a combination of breakthrough chemistry, patented hardware technology, and proprietary software, uncured resin removal can be accomplished in 10 minutes or less for simultaneous trays of printed parts. This newest formulation offers a much higher resin capacity, yielding a longer useful life compared to other chemical methods. With intuitive software controls and process monitoring, the speed and ease of use of the solution results in increased consistency at levels required for production volumes. Ultimately, the attended operator time is greatly reduced and the 403 chemistry is inherently safer to use and store.

Can you benefit from optimizing your SLA resin removal process?
Request a benchmark here.

2495 Main Street, Suite 615
Buffalo NY 14214, USA

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