FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

Abbruzzi Joseph A. 		2. Issuer Name and Ticker or Trading Symbol

LYDALL INC /DE/ [ LDL ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Pres., Technical Nonwovens
(Last)          (First)          (Middle)

C/O LYDALL, INC., ONE COLONIAL ROAD 		3. Date of Earliest Transaction (MM/DD/YYYY)

9/15/2017
(Street)

MANCHESTER, CT 06042
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   9/15/2017     M    1037   A $16.98   (1) 39685   D  
 
Common Stock   9/15/2017     M    1758   A $27.96   (2) 41443   D  
 
Common Stock   9/15/2017     S    2795   D $52.72   (3) 38648   D  
 

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Option to Buy   $16.98   9/15/2017     M         1037    12/6/2014   12/5/2023   Common Stock   1037   $0   1037   D  
 
Option to Buy   $27.96   9/15/2017     M         1758    12/5/2015   12/4/2024   Common Stock   1758   $0   1758   D  
 

Explanation of Responses:
(1)  Reporting Person exercised 1,037 stock options that were granted on December 6, 2013 with a grant price of $16.98 per share.
(2)  Reporting Person exercised 1,758 stock options that were granted on December 5, 2014 with a grant price of $27.96 per share.
(3)  The price reported is the weighted average of all the shares sold on September 15, 2017. The shares were sold at varying prices in the range of $52.605 to $52.7499. The Reporting Person undertakes, upon request by the Staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, to provide full information regarding the number of shares sold at each separate price.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Abbruzzi Joseph A.
C/O LYDALL, INC.
ONE COLONIAL ROAD
MANCHESTER, CT 06042

Pres., Technical Nonwovens

Signatures
Chad A. McDaniel, Attorney-in-fact for Joseph A. Abbruzzi 9/18/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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