NAWC PD 4631-04-23A final.pdf

NAWC PD 4631-04-23A

24 October 2012

SUPERSEDING

NAWC PD 4631-04-23

21 November 2008

FACEMASK, FLEECE, ARAMID, CWU-110/P

This purchase description is approved for use by the Department of the Navy.

1. SCOPE

1.1 Scope. This purchase description covers the requirements for one type of fleece aramid facemask.

1.2 Classification.

1.2.1 Sizes. The facemask shall be furnished in the following sizes as specified (see 6.2)

Medium-Large (M-L) XLarge (XL)

1.2.2. Classes. The facemask will be provided in the classes specified below.

Class 1 – Green 3438 Class 2 – Coyote Brown 3758

2. APPLICABLE DOCUMENTS

2.1 General. The documents listed in this section are specified in sections 3 and 4 of this purchase description. This section does not include documents cited in other sections of this purchase description or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3 and 4 of this purchase description, whether or not they are listed.

2.2 Government documents.

2.2.1 Specifications and standards. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2).

COMMERCIAL ITEM DESCRIPTIONS

A-A-55217 - Thread, Aramid, Spun Staple

DEPARTMENT OF DEFENSE SPECIFICATIONS

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MIL-DTL-32075 - Label: For Clothing, Equipage, and Tentage (General Use)

(Copies of these documents are available online at http://assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

2.2.2 Other Government documents. The following other Government documents form a part of this document to the extent specified herein. Unless otherwise specified, the issue of the documents are those cited in the solicitation or contract.

NAVAL AIR SYSTEMS COMMAND (NAVAIR)

NAWC PD 4631-04-01 - Cloth, Knitted, Velour, Stretch, Flame Resistant NAWC PD 4631-04-03 - Cloth, Knitted, Fleece, Wind Resistant, Flame Resistant NAWC PD 4631-04-08 - Cloth, Knitted, Silk Weight, Stretch, Flame Resistant

(Copies of these documents are available from Defense Supply Center Philadelphia, Clothing and Textiles Directorate, Attn: DSCP-FQSAB, (Bldg 6), 700 Robbins Avenue, Philadelphia, PA 19111-5092. See 6.3).

2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those listed cited in the solicitation or contract (see 6.2).

AMERICAN SOCIETY FOR QUALITY CONTROL (ASQ)

ASQ-Z1.4 Procedures, Sampling and Tables for Inspection by Attribute

(Copies of this document are available from http://www.asq.org or American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.)

AATCC

AATCC Test Method 20A - Fiber Analysis: Quantitative

(Copies of this document are available from http://www.aatcc.org or AATCC, P.O. Box 12215, Research Triangle Park, North Carolina 27709-2215)

ASTM INTERNATIONAL

ASTM-D1777 - Standard Test Method for Thickness of Textile Materials, ASTM-D3774 - Standard Test Method for Width of Textile Fabric ASTM-D5034 - Standard Test Method for Breaking Strength and Elongation of Textile Fabrics ASTM-D5587 - Standard Test Method for Tearing Strength of Fabric by Trapezoid Procedure ASTM-D6193- Standard Practices for Stitches and Seams

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(Copies of this document are available from http://www.astm.org or ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959)

2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.

3. REQUIREMENTS

3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2.

3.2 Design. The facemask shall be a non-adjustable mask covering the nose, mouth and throat. The facemask shall have a pass through slot to accommodate communication devices.

See Figures 1 through 5.

3.3 Materials and components. The materials and components shall conform to applicable specifications, patterns, and drawings and shall be specified herein. Equivalent materials and parts shall require approval by the Naval Air Warfare Center Aircraft Division, Code 4.6.7.3, Patuxent River, Maryland 20670-1906 (see 6.3).

3.3.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs.

3.3.2 Basic material. The body material for the facemask shall be knitted fleece conforming to NAWC PD 4631-04-03. The color and class shall be as specified in contract. See 6.2.

3.3.3 Cloth, knitted silk weight mesh. The material for the center exhaust port shall be flame resistant moisture management silk weight knitted mesh cloth conforming to NAWC PD 4631- 04-08, Type I (Sigificant stretch). The color shall be as specified in contract. See 6.2. When Class 1 Green 3438 is required in the procurement document, the ear mesh and center exhaust port pieces shall be Black 3241.

3.3.4 Cloth, knitted velour. The material for the center back piece shall be a Black 3239 flame resistant stretch knitted velour cloth conforming to NAWC PD 4631-04-01. See 6.2.

3.3.5 Binding. The binding for the facemask shall be 1-½ inches wide conforming to SSM #42627 or equal (see 6.4). The binding shall be a good approximation of the basic material color in 3.3.2

3.3.6 Thread. The thread for stitching the facemask shall be Tex 40 conforming to Type I of A-A-55217 and shall be a good match to the basic material color in 3.3.2.

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3.3.7 Labels. When commercial labels are placed on the facemask, the information on the label shall not conflict with the label requirements specified in this purchase description.

3.3.7.1 Identification/instruction label. Each facemask shall have a combination identification/instruction label conforming to Type IV or VI, class 15 of MIL-DTL-32075. The size of the label shall be 2 (± 1/8) inches wide by 1-3/4 (± 1/8) inches long. When Type IV is used, the printing shall be black and the label background shall be white. The printing shall show fastness to laundering and shall bear the following inscription:

NOMENCLATURE: FACEMASK, FLEECE, ARAMID, CWU-110/P

PD NUMBER: NAWC PD 4631-04-23

FIBER CONTENT: 100% COTTON (EXAMPLE)

CONTRACT NUMBER: SP0100-00-C-0000 (EXAMPLE)

ID: _______________________

NAME OF CONTRACTOR: LMN MANUFACTURERS (EXAMPLE)

LAUNDERING INSTRUCTIONS:

MACHINE WASH COLD,

LINE DRY OR AIR TUMBLE-DRY.

DO NOT USE BLEACH OR FABRIC SOFTENERS.

FOR BEST RESULTS LAUNDER SEPARATELY.

OR

FOLLOW SHIPBOARD WASH FORMULA III

3.3.7.2 Size label. Each facemask shall have a size label conforming to Type IV or VI, class 2 of MIL-DTL-32075. The size of the label shall be 1-1/2 inches wide by 2 inches long (± 1/8). The inscription shall be as stated below.

S-M (Example) STOCK NO. 8405-00-000-0000 (Example)

3.3.7.3 Bar code label. Each item shall be individually bar-coded with a paper tag for personal clothing items. The paper used for the tags shall be a standard bleached sulfate having a basis weight of 100 pounds with a smooth finish to accept thermal transfer and direct printing. The tags shall have a hole and be attached to each item by a fastener, clearly legible and readable by scanner. The bar code element shall be a 13 digit national stock number (NSN). There shall be a twelve digit Universal Product Code (UPC) assigned for all NSNs by the Government. The initials “UPC” shall appear beneath code. The bar codes for NSN and UPC shall be a medium to high density and shall be located so that they are completely visible on the item when it is folded and or packaged as specified. The label’s location shall cause no damage to the item.

3.3.7.4 Commercial manufacturer labels. Sewn in manufacturer and attached labels shall be allowed to identify brands of materials and the product manufacturer (see Figures 3and 4).

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3.4 Figures. Figures 1 through 5 are furnished for information purposes only. When inconsistencies exist between the written specification and the figures, the written specification shall govern.

3.5 Patterns. Standard patterns will be furnished by the government to the contractor for use in cutting working patterns (see 6.3). The standard patterns shall not be altered in any way and are to be used as a guide for making the contractor’s working patterns. Minor modifications of the working patterns are permitted when using automated equipment or to meet a manufacturer’s process but the alterations shall not affect the serviceability, dimensions or appearance of the facemask. Patterns provide for a 3/8 inch seam allowance unless otherwise specified.

3.5.1 List of pattern parts. The component parts of the facemask shall be cut from the materials specified in accordance with Table I.

TABLE I: Pattern parts

Material Pattern Nomenclature Computer Nomenclature

Cut Parts

Cloth, Fleece 3.3.2

Center front bottom UFM-CTR-FR-BTM 1 Left side UFM-LF-SD 1 Right side UFM-RT-SD 1 Lower front UFM-LWR-FR 2 Center top nose bridge UFM-CTR-TOP 1

Cloth, Knit Mesh 3.3.4

Center exhaust port UFM-CTR-EX-PORT 1 Ear mesh UFM-EAR-MESH 2

Cloth, Knit Velour 3.3.3

Center back UFM-CTR-BK 1

Binding 3.3.5 Binding guide GUIDE

3.6 Construction.

3.6.1 Stitches, seams, and stitching. Stitches, seams and stitch types specified in Table II shall conform to ASTM-D6193. Whenever two or more methods, seams, or stitches are given for the same part of an operation, any one of them may be used. Seam allowances shall be maintained with seam sewn so that no raw edges, run-offs, pleats, puckers, or open seams occur. Ends of all stitching when not caught in other seams or stitching shall be backstitched not less than 1/2 inches. Thread tension shall be maintained so there shall be no loose stitching resulting in a loose bottom or top thread or no excessively tight stitching resulting in puckering of the materials sewn.

3.6.2 Repair of stitching.

a. When thread breaks or bobbin run-outs occur during sewing for stitch type 301, the stitching shall be repaired by restarting a minimum of 1/2 inch back of the end of the stitching.

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b. Repairs of types 504 shall be made with a 304 stitch. All other stitch types shall be repaired with a 301 or 304 as applicable.

c. Thread breaks (all stitch types) or two or more consecutive skipped or run-off stitches noted during inspection shall be repaired by over-stitching. The stitching for all other types of stitches shall start a minimum of 1/2 inch back of the defective area, continue over the defective area, and continue a minimum of 1/2 inch beyond the defective area onto the existing stitching.

Loose or tight stitching shall be repaired by removing the defective stitching without damaging the material and restitching in the required manner. The ends of stitching are not required to be backstitched when making the above repairs.

3.6.3 Bar tacking. Bar tacking shall be 3/8 (± 1/8) inch long, 1/8 (+ 1/32) inch wide and shall contain 28 stitches minimal. Bar tacks shall be free from thread breaks and loose stitching (see 4.4.5).

3.7 Manufacturing operations requirements. The facemask shall be manufactured in accordance with all operations specified in Table II. The contractor is not required to follow the exact sequence of operations.

TABLE II. Manufacturing operations

No. Manufacturing operations Stitch Type

Seam Type

1. Cut facemask.

a. The facemask shall be cut in strict accordance with the patterns. All component parts shall be cut lengthwise in the machine direction unless otherwise indicated on patterns. Pile side of knit velour cloth (3.3.4) shall be on inside of facemask.

2. Replacement of damaged parts Care shall be exercised during the spreading, cutting and manufacturing operations to assure that material defects and damages as classified in Table V are excluded and replaced with non-defective material.

3. Marking

a. Mark or bundle cut parts of the facemask to insure a uniform size, uniformity of shade, and proper assembly throughout fabrication.

b. Any method of marking may be used except:

(1) Metal fastening devices.

(2) Sew-on tickets.

(3) Adhesive type tickets which leave traces of adhesive on the material after removal of the tickets.

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TABLE II. Manufacturing operations continued

Seam Type

4. Assemble center.

a. Overedge bottom of nose bridge piece to form the upper portion of the center assembly.

504 EFd-1

b. Bind top edge of center exhaust port piece to form the middle portion of the center assembly.

402 BSc-2

c. Attach bottom edge of exhaust port to top edge of center front bottom piece to form the lower portion of the center assembly.

607 FSa-1

5 Assemble sides.

a. Attach ear mesh piece to upper left piece forming upper left side assemblies. Repeat operation for right side.

b. Attach the upper left side assembly to the lower left side piece forming the left side assembly. Repeat operation for right side.

c. Zig zag edges of communication device slit intersecting seams past each end.

304 EFd-1

d. Bartack with a 3/8 inch bartack on both ends of slit over intersected seams.

Bar-tack

Bartack

6 Assemble center to sides.

a. With center top nose bridge piece at top, center exhaust port piece in middle and center front bottom piece at bottom, stitch sides of these pieces to the left and right side assemblies ensuring there is a gap between the nose bridge piece and center exhaust piece.

7. Assemble facemask and attach labels.

a. Stitch right side of partially formed facemask to right side of center back piece catching top of size label in seam.

Identification label placement shall be centered between bottom edge and seam joining upper and lower right assembly.

b. Stitch left side of partially formed facemask to left side of center back piece catching top of identification label in seam centered between bottom edge and seam joining upper and lower left assembly. Optional commercial labels may be caught in outside bottom overedging on left side.

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TABLE II. Manufacturing operations continued

Seam Type

8. Complete facemask.

a. Bind top edge of facemask starting and stopping at center back. On left side leave a tail.

406 BSc-2

b. Fold and bar tack tail to inside of facemask at bottom of binding.

Bar-tack

Bar tack

c. Overedge bottom edge of facemask starting and stopping in back. Leave a chain tail.

9. Clean facemask.

a. Trim thread ends and remove all loose threads.

b. Remove any spots or stains.

1/ The pattern parts below may be referred to in table differently.

“Left side” equals “Upper left side”.

“Right side” equals “Upper right side”.

“Nose bridge” equals “Center top nose bridge”

3.8 Finished garment measurements. The finished garment measurements shall be as shown in Table III and shall be measured in accordance with 4.4.4.1.

TABLE III: Finished garment measurements (inches)

Size Finished Across Neck

Seam Flat A/

Finished Around

Bottom Edge Flat B/

Finished Center Back Top to

Bottom C/

Finished Center Front Top to

Bottom D/

ML 8 14 7-3/8 12

XL 9-1/2 16-1/2 8-1/8 12-3/4

Tolerance ± ¼ ± ¼ ± ¼ ± ¼

3.9 Workmanship. The finished facemask shall be uniform in quality and free from loose thread, foreign matter, and irregular defects that can adversely affect usage or durability and those defects specified in Table V.

4. VERIFICATION

4.1 Classification of inspections. The inspection requirements specified herein are classified as follows:

a. First article inspection (see 4.2).

b. Conformance inspection (see 4.3)

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4.2 First article inspection. First article inspection shall consist of the examinations and tests specified in 4.4.2, 4.4.3, and 4.4.4.

4.2.1 First article samples. Unless otherwise specified in the contract or purchase order (see 6.2), the number of samples for first article inspections shall be one facemask for each sized ordered. The sample unit shall be one facemask and the lot size shall be expressed in units of facemasks.

4.3 Conformance inspection. Conformance testing shall consist of the examinations specified in 4.4.1, 4.4.2, 4.4.3 and 4.4.4.

4.3.1 Conformance inspection samples. Sampling for inspection shall be performed in accordance with ASQC-Z1.4. The sample unit shall be one facemask and the lot size shall be expressed in units of facemasks.

4.4 Inspection methods.

4.4.1 In-process inspection. Visual and dimensional examinations of the facemask and its components or optional items shall be made at any point or during any phase of the manufacturing process to determine whether construction details which cannot be examined in the finished product are in accordance with requirements specified in Section 3. Materials and components, which can be classified, as a defect in accordance with Table V shall be removed from production.

4.4.2 Component and material examinations and tests. In accordance with 4.1, components and materials shall be examined and tested in accordance with the specified examinations and tests of Table IV.

TABLE IV: Component and material examinations and tests

Material Characteristic Reference Test Method Cloth, Fleece Material identification 3.3.2 All tests and examinations specified in NAWC

PD 4631-04-03

Cloth, Knit Mesh

Material identification 3.3.3 All tests and examinations specified in NAWC

PD 4631-04-08

Cloth, Knit, Velour

Material identification 3.3.4 All tests and examinations specified in NAWC

PD 4631-04-01

Binding tape Material identification 3.3.5 Visual & Dimensional 1/

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TABLE IV: Component and material examinations and tests

Material Characteristic Reference Test Method Thread Material identification 3.3.6 All tests and examinations specified in A-A- 55217

Labels Material identification 3.3.7 All tests and examinations specified in MIL-

DTL-32075

1/ One test specimen 12 inches long shall be examined for visual and dimensional conformance.

Width measurement shall be taken. Any suitable measuring device shall be acceptable. The results shall be recorded as pass or fail.

4.4.3 Visual Examinations. The end items shall be visually examined and measured for the defects listed in Table V.

TABLE V. Classification of end item defects.

Examine Defect Classification Major Minor General Any hole, scissor or knife cut, tear, mend, burn, or weakening defect such as multiple floats, slubs, skips, needle chew or abraded area

Any spot or stain (compound, oil, dirt, including marks) clearly visible

Color of any component not as specified 202 Any thread not trimmed to 1/16 inch or thread scraps not removed

Components and assembly

Any defective component or defect that will affect the form, fit or function of the assembly

Any component part not as specified or required operation improperly performed

Any component part not cut in accordance with the patterns

Any component or operation omitted 105 Seams and stitching Any open seam. 106 Any seam or attachment of any component twisted, puckered, pleated or caught in any unrelated operation or stitching that is not properly forced out or contained in a fold more than 1/8 inch.

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TABLE V. Classification of end item defects continued.

Examine Defect Classification Major Minor Seams and stitching con’t.

End of stitching not securely backstitched for at least ½ inch when not caught in other seams or stitching.

Thread breaks, skips and run-offs not securely overstitched for at least ½ inch.

Any stitching irregular or unevenly gauged (greater than 50% of the seam length or 4 inches, whichever is less).

Not specified seam or stitch type. 111 Loose tension resulting in a loose seam or tight tension resulting in breaking of stitches when normal pull is applied.

Stitches per inch - one or two stitches more or less than specified (to be scored only when condition exists on 25% of the seam or more).

Stitches per inch more than two stitches more or less than specified (to be scored only when condition exists on ¼ of the seam or more).

Label, Identification/ instruction & size

Label missing, information illegible or incorrect

Label misplaced by more than 1 inch 205 Bar code label Bar code label omitted, incorrect, illegible, not attached where specified; bar codes omitted, not readable by scanner; human-readable interpretation (HRI) omitted or illegible; bar code not visible on folded, packaged item; bar code attachment causes damage to the item

Finished appearance

No shade parts on finished facemask, pile side of knit velour cloth on outside of facemask

Dimensional Any finished garment dimensions not within the specified tolerance

4.4.4 End item dimensional examination. The end item shall be examined for conformance to the dimensions specified in Table III (see Figures 1 through 3) and scored in accordance with Table V.

4.4.4.1 Method of measuring. The facemask shall be placed relaxed flat upon a table and measured as follows (see Figures 3 through 5):

A/ Finished Across Neck Seam Flat. The neck seam shall be measured from folded edge to folded edge across the neck seam.

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B/ Finished Around Bottom Edge Flat. The bottom edge shall be measured from folded edge to folded edge across the bottom curved edge of the facemask.

C/ Finished Center Back Top to Bottom. The center back shall be measured from the top of the center back finished edge to the bottom of the center back finished edge.

D/ Finished Center Front Top to Bottom. The center front shall be measured from the top of the center front finished edge to the bottom of the center front finished edge.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of material is to be performed by DoD or in-house contractor personnel, these personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by Inventory Control Point’s packaging activity within the Military Service or Defense Agency, or within the military service’s system commands. Packaging data retrieval is available from the managing Military Department’s or Defense Agency’s automated packaging files, CD-ROM products, or by contacting the responsible packaging activity.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use. The facemask covered by this purchase description is intended for use in cold weather operations. When layered with other components, the facemask becomes part of the Multi Climate Protection clothing system.

6.2 Acquisition documents. Acquisition documents must specify the following:

a. Title, number, and date of this purchase description, including any amendments.

b. Applicable Government including any revisions and non-government documents cited under Section 2.

c. Size, quantity and class desired (see 1.2).

d. National stock number.

e. Applicable Government patterns, including revisions.

f. First article and conformance inspection requirements (see 4.2 and 4.3).

g. Name and address of the first article inspection facility; and the name and address of the Government activity responsible for conducting the first article inspection program.

h. Packaging requirements (see 5.1).

6.3 Pattern/Information requests. For access to information such as patterns, drawings, standard shade samples of cloth etc. go to Defense Supply Center Philadelphia's website for their Specification/Pattern/Drawing Request form, http://www.dscp.dla.mil/portal/sreqfrm.aspx.

http://www.dscp.dla.mil/portal/sreqfrm.aspx

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Complete the request form and then submit. Requests to use equivalent materials and/or components or to make changes to the pattern should be sent to the contracting officer for approval by the military services.

6.4 Sources.

6.4.1 Knit mesh cloth. Deer Creek Knitting, Style 3231 with 3% Lycra, has been known to meet the requirements of paragraph 3.3.2. Deer Creek can be reached at 509 Glenbrook Road, Stamford, CT 06906, http://www.deercreekfabrics.com.

6.4.2 Binding tape. SSM Style #42627, has been known to meet the requirements of paragraph

3.3.4. SSM Industries can be reached at 211 Ellis Avenue, Spring City, TN 37381, www.http://www.ssmind.com.

6.5 Subject terms (key word) listing.

Aramid Knit Silkweight Multi Climate Protection Knit Stretch Velour

CONCLUDING MATERIAL

Custodian Preparing Activity:

Navy-AS Navy - AS

Review Activity Navy-NU

DLA-CT

http://www.deercreekfabrics.com/

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Figure 1. Facemask, front view with details.

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Figure 2: Facemask, back view with details.

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Figure 3: Facemask, inside front view with details.

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Figure 4. Facemask, front view with dimensional details.

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Figure 5. Facemask, back view with dimensional details.