EXHIBIT 3.46

                                     BY-LAWS

                                       OF

                    MILACRON PLASTICS TECHNOLOGIES GROUP INC.

                                    ARTICLE I

                            Meetings of Stockholders

            Section 1.1. Annual Meetings. An annual meeting of stockholders
shall be held for the election of directors at such date, time and place, either
within or without the State of Delaware, as may be designated by resolution of
the Board of Directors from time to time. Any other proper business may be
transacted at the annual meeting.

            Section 1.2. Special Meetings. Special meetings of stockholders for
any purpose or purposes may be called at any time by the Board of Directors, but
such special meetings may not be called by any other person or persons. Business
transacted at any special meeting of stockholders shall be limited to the
purposes stated in the notice.

            Section 1.3. Notice of Meetings. Whenever stockholders are required
or permitted to take any action at a meeting, a written notice of the meeting
shall be given that shall state the place, date and hour of the meeting and, in
the case of a special meeting, the purpose or purposes for which the meeting is
called. Unless otherwise provided by law, the certificate of incorporation or
these by-laws, the written notice of any meeting shall be given not less than
ten (10) nor more than sixty (60) days before the date of the meeting to each
stockholder entitled to vote at such meeting. If mailed, such notice shall be
deemed to be given when deposited in the United States mail, postage prepaid,
directed to the stockholder at his address as it appears on the records of the
corporation.

            Section 1.4. Adjournments. Any meeting of stockholders, annual or
special, may adjourn from time to time to reconvene at the same or some other
place, and notice need not be given of any such adjourned meeting if the time
and place thereof are announced at the meeting at which the adjournment is
taken. At the adjourned meeting the corporation may transact any business which
might have been transacted at the original meeting. If the adjournment is for
more than thirty (30) days, or if after the adjournment a new record date is
fixed for the adjourned meeting, notice of the adjourned meeting shall be given
to each stockholder of record entitled to vote at the meeting.



            Section 1.5. Quorum. Except as otherwise provided by law, the
certificate of incorporation or these by-laws, at each meeting of stockholders
the presence in person or by proxy of the holders of a majority in voting power
of the outstanding shares of stock entitled to vote at the meeting shall be
necessary and sufficient to constitute a quorum. In the absence of a quorum, the
stockholders so present may, by a majority in voting power thereof, adjourn the
meeting from time to time in the manner provided in Section 1.4 of these by-laws
until a quorum shall attend. Shares of its own stock belonging to the
corporation or to another corporation, if a majority of the shares entitled to
vote in the election of directors of such other corporation is held, directly or
indirectly, by the corporation, shall neither be entitled to vote nor be counted
for quorum purposes; provided, however, that the foregoing shall not limit the
right of the corporation or any subsidiary of the corporation to vote stock,
including but not limited to its own stock, held by it in a fiduciary capacity.

            Section 1.6. Organization. Meetings of stockholders shall be
presided over by the Chairman of the Board, if any, or in his absence by the
Vice Chairman of the Board, if any, or in his absence by the President, or in
his absence by a Vice President, or in the absence of the foregoing persons by a
chairman designated by the Board of Directors, or in the absence of such
designation by a chairman chosen at the meeting. The Secretary shall act as
secretary of the meeting, but in his absence the chairman of the meeting may
appoint any person to act as secretary of the meeting.

            Section 1.7. Voting; Proxies. Except as otherwise provided by or
pursuant to the provisions of the certificate of incorporation, each stockholder
entitled to vote at any meeting of stockholders shall be entitled to one vote
for each share of stock held by such stockholder which has voting power upon the
matter in question. Each stockholder entitled to vote at a meeting of
stockholders or to express consent or dissent to corporate action in writing
without a meeting may authorize another person or persons to act for such
stockholder by proxy, but no such proxy shall be voted or acted upon after three
years from its date, unless the proxy provides for a longer period. A proxy
shall be irrevocable if it states that it is irrevocable and if, and only as
long as, it is coupled with an interest sufficient in law to support an
irrevocable power. A stockholder may revoke any proxy which is not irrevocable
by attending the meeting and voting in person or by filing an instrument in
writing revoking the proxy or by delivering a proxy in accordance with
applicable law bearing a later date to the Secretary of the corporation. Voting
at meetings of stockholders need not be by written ballot. At all meetings of
stockholders for the election of directors a plurality of the votes cast shall
be sufficient to elect. All other elections and questions shall, unless
otherwise provided by the certificate of incorporation, these by-laws, the rules
or regulations of any stock exchange applicable to the corporation, as otherwise
provided by law or pursuant to any regulation applicable to the corporation, be
decided by the affirmative vote of the holders of a majority in voting power of
the shares of stock of the corporation which are present in person or by proxy
and entitled to vote thereon.

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            Section 1.8. Fixing Date for Determination of Stockholders of
Record. In order that the corporation may determine the stockholders entitled to
notice of or to vote at any meeting of stockholders or any adjournment thereof,
or to express consent to corporate action in writing without a meeting, or
entitled to receive payment of any dividend or other distribution or allotment
of any rights, or entitled to exercise any rights in respect of any change,
conversion or exchange of stock or for the purpose of any other lawful action,
the Board of Directors may fix a record date, which record date shall not
precede the date upon which the resolution fixing the record date is adopted by
the Board of Directors, and which record date: (1) in the case of determination
of stockholders entitled to vote at any meeting of stockholders or adjournment
thereof, shall, unless otherwise required by law, not be more than sixty (60)
nor less than ten (10) days before the date of such meeting; (2) in the case of
determination of stockholders entitled to express consent to corporate action in
writing without a meeting, shall not be more than ten (10) days from the date
upon which the resolution fixing the record date is adopted by the Board of
Directors; and (3) in the case of any other action, shall not be more than sixty
(60) days prior to such other action. If no record date is fixed: (1) the record
date for determining stockholders entitled to notice of or to vote at a meeting
of stockholders shall be at the close of business on the day next preceding the
day on which notice is given, or, if notice is waived, at the close of business
on the day next preceding the day on which the meeting is held; (2) the record
date for determining stockholders entitled to express consent to corporate
action in writing without a meeting, when no prior action of the Board of
Directors is required by law, shall be the first date on which a signed written
consent setting forth the action taken or proposed to be taken is delivered to
the corporation in accordance with applicable law, or, if prior action by the
Board of Directors is required by law, shall be at the close of business on the
day on which the Board of Directors adopts the resolution taking such prior
action; and (3) the record date for determining stockholders for any other
purpose shall be at the close of business on the day on which the Board of
Directors adopts the resolution relating thereto. A determination of
stockholders of record entitled to notice of or to vote at a meeting of
stockholders shall apply to any adjournment of the meeting; provided, however,
that the Board of Directors may fix a new record date for the adjourned meeting.

            Section 1.9. List of Stockholders Entitled to Vote. The Secretary
shall prepare and make, at least ten (10) days before every meeting of
stockholders, a complete list of the stockholders entitled to vote at the
meeting, arranged in alphabetical order, and showing the address of each
stockholder and the number of shares registered in the name of each stockholder.
Such list shall be open to the examination of any stockholder, for any purpose
germane to the meeting, during ordinary business hours, for a period of at least
ten (10) days prior to the meeting, either at a place within the city where the
meeting is to be held, which place shall be specified in the notice of the
meeting, or if not so specified, at the place where the meeting is to be held.
The list shall also be produced and kept at the time and place of the meeting
during the whole time thereof and may be inspected by any stockholder who is
present. Upon the willful neglect or refusal of the directors to produce such a
list at any meeting for the election of directors, they shall be ineligible for
election to

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any office at such meeting. Except as otherwise provided by law, the stock
ledger shall be the only evidence as to who are the stockholders entitled to
examine the stock ledger, the list of stockholders or the books of the
corporation, or to vote in person or by proxy at any meeting of stockholders.

            Section 1.10. Action By Written, Consent of Stockholders. Unless
otherwise restricted by the certificate of incorporation, any action required or
permitted to be taken at any annual or special meeting of the stockholders may
be taken without a meeting, without prior notice and without a vote, if a
consent or consents in writing, setting forth the action so taken, shall be
signed by the holders of outstanding stock having not less than the minimum
number of votes that would be necessary to authorize or take such action at a
meeting at which all shares entitled to vote thereon were present and voted and
shall be delivered to the corporation by delivery to its registered office in
the State of Delaware, its principal place of business, or an officer or agent
of the corporation having custody of the book in which minutes of proceedings of
stockholders are recorded. Delivery made to the corporation's registered office
shall be by hand or by certified or registered mail, return receipt requested.
Prompt notice of the taking of the corporate action without a meeting by less
than unanimous written consent shall, to the extent required by law, be given to
those stockholders who have not consented in writing and who, if the action had
been taken at a meeting, would have been entitled to notice of the meeting if
the record date for such meeting had been the date that written consents signed
by a sufficient number of holders to take the action were delivered to the
corporation.

            Section 1.11. Inspectors of Election. The corporation may, and shall
if required by law, in advance of any meeting of stockholders, appoint one or
more inspectors of election, who may be employees of the corporation, to act at
the meeting or any adjournment thereof and to make a written report thereof. The
corporation may designate one or more persons as alternate inspectors to replace
any inspector who fails to act. In the event that no inspector so appointed or
designated is able to act at a meeting of stockholders, the person presiding at
the meeting shall appoint one or more inspectors to act at the meeting. Each
inspector, before entering upon the discharge of his or her duties, shall take
and sign an oath to execute faithfully the duties of inspector with strict
impartiality and according to the best of his or her ability. The inspector or
inspectors so appointed or designated shall (i) ascertain the number of shares
of capital stock of the corporation outstanding and the voting power of each
such share, (ii) determine the shares of capital stock of the corporation
represented at the meeting and the validity of proxies and ballots, (iii) count
all votes and ballots, (iv) determine and retain for a reasonable period a
record of the disposition of any challenges made to any determination by the
inspectors, and (v) certify their determination of the number of shares of
capital stock of the corporation represented at the meeting and such inspectors'
count of all votes and ballots. Such certification and report shall specify such
other information as may be required by law. In determining the validity and
counting of proxies and ballots cast at any meeting of stockholders of the
corporation, the inspectors may consider such information as is

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permitted by applicable law. No person who is a candidate for an office at an
election may serve as an inspector at such election.

            Section 1.12. Conduct of Meetings. The date and time of the opening
and the closing of the polls for each matter upon which the stockholders will
vote at a meeting shall be announced at the meeting by the person presiding over
the meeting. The Board of Directors may adopt by resolution such rules and
regulations for the conduct of the meeting of stockholders as it shall deem
appropriate. Except to the extent inconsistent with such rules and regulations
as adopted by the Board of Directors, the chairman of any meeting of
stockholders shall have the right and authority to prescribe such rules,
regulations and procedures and to do all such acts as, in the judgment of such
chairman, are appropriate for the proper conduct of the meeting. Such rules,
regulations or procedures, whether adopted by the Board of Directors or
prescribed by the chairman of the meeting, may include, without limitation, the
following: (i) the establishment of an agenda or order of business for the
meeting; (ii) rules and procedures for maintaining order at the meeting and the
safety of those present; (iii) limitations on attendance at or participation in
the meeting to stockholders of record of the corporation, their duly authorized
and constituted proxies or such other persons as the chairman of the meeting
shall determine; (iv) restrictions on entry to the meeting after the time fixed
for the commencement thereof; and (v) limitations on the time allotted to
questions or comments by participants. Unless and to the extent determined by
the Board of Directors or the chairman of the meeting, meetings of stockholders
shall not be required to be held in accordance with the rules of parliamentary
procedure.

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                                   ARTICLE II

                               Board of Directors

            Section 2.1. Number; Qualifications. The Board of Directors shall
consist of one or more members, the number thereof to be determined from time to
time by resolution of the Board of Directors. Directors need not be
stockholders.

            Section 2.2. Election; Resignation; Vacancies. The Board of
Directors shall initially consist of the persons named as directors in the
certificate of incorporation or elected by the incorporator of the corporation,
and each director so elected shall hold office until the first annual meeting of
stockholders or until his successor is duly elected and qualified. At the first
annual meeting of stockholders and at each annual meeting thereafter, the
stockholders shall elect directors each of whom shall hold office for a term of
one year or until his successor is duly elected and qualified, subject to such
director's earlier death, resignation, disqualification or removal. Any director
may resign at any time upon written notice to the corporation. Unless otherwise
provided by law or the certificate of incorporation, any newly created
directorship or any vacancy occurring in the Board of Directors for any cause
may be filled by a majority of the remaining members of the Board of Directors,
although such majority is less than a quorum, or by a plurality of the votes
cast at a meeting of stockholders, and each director so elected shall hold
office until the expiration of the term of office of the director whom he has
replaced or until his successor is elected and qualified.

            Section 2.3. Regular Meetings. Regular meetings of the Board of
Directors may be held at such places within or without the State of Delaware and
at such times as the Board of Directors may from time to time determine.

            Section 2.4. Special Meetings. Special meetings of the Board of
Directors may be held at any time or place within or without the State of
Delaware whenever called by the President, any Vice President, the Secretary, or
by any member of the Board of Directors. Notice of a special meeting of the
Board of Directors shall be given by the person or persons calling the meeting
at least twenty-four hours before the special meeting.

            Section 2.5. Telephonic Meetings Permitted. Members of the Board of
Directors, or any committee designated by the Board of Directors, may
participate in a meeting thereof by means of conference telephone or similar
communications equipment by means of which all persons participating in the
meeting can hear each other, and participation in a meeting pursuant to this
by-law shall constitute presence in person at such meeting.

            Section 2.6. Quorum; Vote Required for Action. At all meetings of
the Board of Directors a majority of the whole Board of Directors shall
constitute a quorum for

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the transaction of business. Except in cases in which the certificate of
incorporation, these by-laws or applicable law otherwise provides, the vote of a
majority of the directors present at a meeting at which a quorum is present
shall be the act of the Board of Directors.

            Section 2.7. Organization. Meetings of the Board of Directors shall
be presided over by the Chairman of the Board, if any, or in his absence by the
Vice Chairman of the Board, if any, or in his absence by the President, or in
their absence by a chairman chosen at the meeting. The Secretary shall act as
secretary of the meeting, but in his absence the chairman of the meeting may
appoint any person to act as secretary of the meeting.

            Section 2.8. Action by Written Consent of Directors. Unless
otherwise restricted by the certificate of incorporation or these by-laws, any
action required or permitted to be taken at any meeting of the Board of
Directors, or of any committee thereof, may be taken without a meeting if all
members of the Board of Directors or such committee, as the case may be, consent
thereto in writing, and the writing or writings are filed with the minutes of
proceedings of the Board of Directors or such committee.

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                                   ARTICLE III

                                   Committees

            Section 3.1. Committees. The Board of Directors may designate one or
more committees, each committee to consist of one or more of the directors of
the corporation. The Board of Directors may designate one or more directors as
alternate members of any committee, who may replace any absent or disqualified
member at any meeting of the committee. In the absence or disqualification of a
member of the committee, the member or members thereof present at any meeting
and not disqualified from voting, whether or not he or they constitute a quorum,
may unanimously appoint another member of the Board of Directors to act at the
meeting in place of any such absent or disqualified member. Any such committee,
to the extent permitted by law and to the extent provided in the resolution of
the Board of Directors, shall have and may exercise all the powers and authority
of the Board of Directors in the management of the business and affairs of the
corporation, and may authorize the seal of the corporation to be affixed to all
papers which may require it.

            Section 3.2. Committee Rules. Unless the Board of Directors
otherwise provides, each committee designated by the Board of Directors may
make, alter and repeal rules for the conduct of its business. In the absence of
such rules each committee shall conduct its business in the same manner as the
Board of Directors conducts its business pursuant to Article II of these
by-laws.

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                                   ARTICLE IV

                                    Officers

            Section 4.1. Executive Officers; Election; Qualifications; Term of
Office; Resignation; Removal; Vacancies. The Board of Directors shall elect a
President and Secretary, and it may, if it so determines, choose a Chairman of
the Board and a Vice Chairman of the Board from among its members. The Board of
Directors may also choose one or more Vice Presidents, one or more Assistant
Secretaries, a Treasurer and one or more Assistant Treasurers. Each such officer
shall hold office until the first meeting of the Board of Directors after the
annual meeting of stockholders next succeeding his election, and until his
successor is elected and qualified or until his earlier resignation or removal.
Any officer may resign at any time upon written notice to the corporation. The
Board of Directors may remove any officer with or without cause at any time, but
such removal shall be without prejudice to the contractual rights of such
officer, if any, with the corporation. Any number of offices may be held by the
same person. Any vacancy occurring in any office of the corporation by death,
resignation, removal or otherwise may be filled for the unexpired portion of the
term by the Board of Directors at any regular or special meeting.

            Section 4.2. Powers and Duties of Executive Officers. The officers
of the corporation shall have such powers and duties in the management of the
corporation as may be prescribed in a resolution by the Board of Directors and,
to the extent not so provided, as generally pertain to their respective offices,
subject to the control of the Board of Directors. The Board of Directors may
require any officer, agent or employee to give security for the faithful
performance of his duties.

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                                    ARTICLE V

                                      Stock

            Section 5.1. Certificates. Every holder of stock shall be entitled
to have a certificate signed by or in the name of the corporation by the
Chairman or Vice Chairman of the Board of Directors, if any, or the President or
a Vice President, and by the Treasurer or an Assistant Treasurer, or the
Secretary or an Assistant Secretary, of the corporation certifying the number of
shares owned by him in the corporation. Any of or all the signatures on the
certificate may be a facsimile. In case any officer, transfer agent or registrar
who has signed or whose facsimile signature has been placed upon a certificate
shall have ceased to be such officer, transfer agent, or registrar before such
certificate is issued, it may be issued by the corporation with the same effect
as if he were such officer, transfer agent, or registrar at the date of issue.

            Section 5.2. Lost, Stolen or Destroyed Stock Certificates; Issuance
of New Certificates. The corporation may issue a new certificate of stock in the
place of any certificate theretofore issued by it, alleged to have been lost,
stolen or destroyed, and the corporation may require the owner of the lost,
stolen or destroyed certificate, or his legal representative, to give the
corporation a bond sufficient to indemnify it against any claim that may be made
against it on account of the alleged loss, theft or destruction of any such
certificate or the issuance of such new certificate.

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                                   ARTICLE VI

                                 Indemnification

            Section 6.1. Right to Indemnification. The corporation shall
indemnify and hold harmless, to the fullest extent permitted by applicable law
as it presently exists or may hereafter be amended, any person (an "Indemnitee")
who was or is made or is threatened to be made a party or is otherwise involved
in any action, suit or proceeding, whether civil, criminal, administrative or
investigative (a "proceeding"), by reason of the fact that he, or a person for
whom he is the legal representative, is or was a director or officer of the
corporation or, while a director or officer of the corporation, is or was
serving at the written request of the corporation as a director, officer,
employee or agent of another corporation or of a partnership, joint venture,
trust, enterprise or nonprofit entity, including service with respect to
employee benefit plans, against all liability and loss suffered and expenses
(including attorneys' fees) reasonably incurred by such Indemnitee.
Notwithstanding the preceding sentence, except as otherwise provided in Section
6.3, the corporation shall be required to indemnify an Indemnitee in connection
with a proceeding (or part thereof) commenced by such Indemnitee only if the
commencement of such proceeding (or part thereof) by the Indemnitee was
authorized by the Board of Directors.

            Section 6.2. Prepayment of Expenses. The corporation shall pay the
expenses (including attorneys' fees) incurred by an Indemnitee in defending any
proceeding in advance of its final disposition, provided, however, that, to the
extent required by law, such payment of expenses in advance of the final
disposition of the proceeding shall be made only upon receipt of an undertaking
by the Indemnitee to repay all amounts advanced if it should be ultimately
determined that the Indemnitee is not entitled to be indemnified under this
Article VI or otherwise.

            Section 6.3. Claims. If a claim for indemnification or advancement
of expenses under this Article VI is not paid in full within sixty (60) days
after a written claim therefor by the Indemnitee has been received by the
corporation, the Indemnitee may file suit to recover the unpaid amount of such
claim and, if successful in whole or in part, shall be entitled to be paid the
expense of prosecuting such claim. In any such action the corporation shall have
the burden of proving that the Indemnitee is not entitled to the requested
indemnification or advancement of expenses under applicable law.

            Section 6.4. Nonexclusivity of Rights. The rights conferred on any
Indemnitee by this Article VI shall not be exclusive of any other rights which
such Indemnitee may have or hereafter acquire under any statute, provision of
the certificate of incorporation, these by-laws, agreement, vote of stockholders
or disinterested directors or otherwise.

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            Section 6.5. Other Sources. The corporation's obligation, if any, to
indemnify or to advance expenses to any Indemnitee who was or is serving at its
request as a director, officer, employee or agent of another corporation,
partnership, joint venture, trust, enterprise or nonprofit entity shall be
reduced by any amount such Indemnitee may collect as indemnification or
advancement of expenses from such other corporation, partnership, joint venture,
trust, enterprise or non-profit enterprise.

            Section 6.6. Amendment or Repeal. Any repeal or modification of the
foregoing provisions of this Article VI shall not adversely affect any right or
protection hereunder of any Indemnitee in respect of any act or omission
occurring prior to the time of such repeal or modification.

            Section 6.7. Other Indemnification and Prepayment of Expenses. This
Article VI shall not limit the right of the corporation, to the extent and in
the manner permitted by law, to indemnify and to advance expenses to persons
other than Indemnitees when and as authorized by appropriate corporate action.

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                                   ARTICLE VII

                                  Miscellaneous

            Section 7.1. Fiscal Year. The fiscal year of the corporation shall
be determined by resolution of the Board of Directors.

            Section 7.2. Seal. The corporate seal shall have the name of the
corporation inscribed thereon and shall be in such form as may be approved from
time to time by the Board of Directors.

            Section 7.3. Manner of Notice. Except as otherwise provided herein,
notices to directors and stockholders shall be in writing and delivered
personally or mailed to the directors or stockholders at their addresses
appearing on the books of the corporation. Notice to directors may be given by
telegram, telecopier, telephone or other means of electronic transmission.

            Section 7.4. Waiver of Notice of Meetings of Stockholders, Directors
and Committees. Any written waiver of notice, signed by the person entitled to
notice, whether before or after the time stated therein, shall be deemed
equivalent to notice. Attendance of a person at a meeting shall constitute a
waiver of notice of such meeting, except when the person attends a meeting for
the express purpose of objecting, at the beginning of the meeting, to the
transaction of any business because the meeting is not lawfully called or
convened. Neither the business to be transacted at nor the purpose of any
regular or special meeting of the stockholders, directors, or members of a
committee of directors need be specified in any written waiver of notice.

            Section 7.5. Form of Records. Any records maintained by the
corporation in the regular course of its business, including its stock ledger,
books of account, and minute books, may be kept on, or be in the form of, punch
cards, magnetic tape, photographs, microphotographs, or any other information
storage device, provided that the records so kept can be converted into clearly
legible form within a reasonable time.

            Section 7.6. Amendment of By-Laws. These by-laws may be altered,
amended or repealed, and new by-laws made, by the Board of Directors, but the
stockholders may make additional by-laws and may alter and repeal any by-laws
whether adopted by them or otherwise.

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