Texas Specification No. 735-20-01
Effective Date: July 1, 1983
Reformatted: February 28,1996
1. SCOPE: This specification establishes the minimum requirements for one class and one type of "heavy duty" non-woven, non-aperatured, highly absorbent, fabric wipers for general purpose wiping, cleaning, and polishing operations on dry, wet, or oily surfaces. Wipers shall be soft enough to use on transparent plastic surfaces such as plexiglass without scratching or abrading. The wipers described by this specification are intended to be capable of fulfilling the same task now being served by muslin rags and shop towels.
2. APPLICABLE SPECIFICATIONS AND STANDARDS: References to specifications, standards and test methods shall be to the issues in effect on the date of the Invitation for Bids.
3. DEFINITIONS: Terminology used in this specification is intended to be generic in nature and consistent with meanings that have been defined through general use and/or accepted trade practices. Where variant meanings may exist, the applicable interpretation shall be determined by the Texas Procurement and Support Services (TPASS).
3.1. Commission: Texas Procurement and Support Services.
3.2. Non-aperatured: Without holes or perforations.
3.3. Non-woven Fabric: Materials made primarily of textile fibers held together by applied bonding or adhesive agent or by the fusing of self-contained thermoplastic fibers.
3.4. Tacky: The condition of being sticky or adhesive.
4. REQUIREMENTS: Products furnished under this specification shall meet or exceed the following requirements:
4.1. General Requirements: Wipers shall be constructed of a non-woven or bonded fabric that can generally serve in the same applications as muslin rags or shop towels with regard to heavy duty cleaning, wiping, and polishing. Wipers shall be of new manufacture, clean, uniform in size and thickness, and free of holes, tears or extraneous matter.
Wipers shall be considered basically disposable but shall be sufficiently durable to withstand washing and reusing as is economically practicable to the end user.
4.2. Size: The size (area) of each towel shall be not less than 156 square inches with one dimension not less than 11-1/2 inches.
4.3. Color: The color may be white or colored provided the color does not bleed in water, detergent solutions, or solvents.
4.4. Material: Wipers shall be constructed so that the resulting material is soft and absorbent yet tough, durable, and virtually lint free. Wipers (wet or dry) shall be required to wipe down soft plastics such as plexiglass without scratching or abrading. The material shall withstand two (2) or more washings in a home type washer using household detergents at a warm temperature (110 ° -120 °F) without deterioration. Material shall not breakdown under harsh chemicals used in building maintenance, auto and machine shops, and print shops.
4.5. Construction: Wipers shall be constructed of textile grade fibers resulting in a non-woven, non-aperated, singl-ply fabric with uniform thickness and dimension. Construction practices that result in materials with distinct machine and cross directions or materials without apparent direction are equally acceptable provided they meet the physical requirements of Paragraph 4.6.
4.6. Physical Properties: (Tested in accordance with Paragraph 6.)
4.6.1. Absorbency: Wipers shall be highly absorbent and shall be required to pass absorbency tests in accordance with Paragraph 6.2.
4.6.2. Tensile Strength: Five (5) pound per inch wet or dry (machine or cross direction) as tested in accordance with Paragraph 6.3.
4.6.3. Elongation: A maximum of 150 percent wet or dry when subjected to five (5) pounds per inch width tension wet or dry. Test in accordance with Paragraph 6.4.
4.6.4. Resistance to Heat: 300 °F shall be the minimum acceptable melting point and no tackiness shall be exhibited below 150 °F (test in accordance with Paragraph 6.5.).
4.7. Workmanship: Wipers shall be free of holes, cuts, tears, or wrinkles. Wipers shall be uniform in size and thickness with all edges cleanly cut. Wipers shall be clean with no evidence of dirt, metal filings, or other extraneous material. Wipers shall be free of any defect that might affect serviceability or performance.
5. SAMPLES: Unless otherwise specified in the Invitation for Bids, no prepurchase samples shall be required. Samples tested shall be obtained from products supplied on regular orders.
6. TESTING: Testing shall be done by or at the direction of, the Commission and/or the receiving State agency. Tests shall be performed on products from shipments to ordering agencies. In the event products tested fail to meet or exceed all conditions and requirements of this specification, the cost of the samples used and the cost of testing shall be borne by the supplier.
6.1. Tests: The product furnished under this specification shall be tested by the following methods or approved equally applicable procedures:
6.1.1. Conditioning Samples: All wipers tested shall be conditioned in a typical office environment (which is defined as 72 °F ± 2 °F) at a relative humidity of 50% ± 10%) for a period of 48 hours prior to testing.
6.1.2. Absorbency Tests:
18.104.22.168. Rate of Absorbency: Each of three (3) randomly selected sample wipers shall be laid on a non-absorbent flat surface. One drop of distilled water and one drop of light machine oil, each 0.04 ml in volume and 72 °F ± 1 °F shall be applied separately to each wiper through a capillary by allowing the drops to fall freely onto the wipers from a height of approximately two (2) inches. After 10 seconds the sample shall be examined and absorption or non-absorption of the water and oil reported. The wiper is considered unacceptable if the water or oil remains wholly or partly above the surface of the fabric.
6.2.2. Total Absorption:
22.214.171.124. Water: From each of three (3) randomly selected sample wipers, 4" x 4" ± 1/8" specimens shall be weighed and immersed in 72 °F ± 2 °F water for three (3) minutes ( ± 10 seconds). The specimens shall then be removed from the water by lifting them at one corner until their surfaces are vertical to the floor, thus allowing the excess water to drain off for 60 ± 10 seconds. They shall then be placed in tarred weighing bottles and re-weighed. Subtract the dry weight from the wet weight. The result shall be divided by 16 to get the weight absorbed per square inch. Water absorption values of 0.175 grams per square inch or more constitutes passage of this requirement; values of less than 0.175 grams per square inch constitutes failure.
126.96.36.199. Oil: Substituting light machine oil, use same test procedure as for water (Paragraph 188.8.131.52.) but drain time shall be increased to 20 ± 2 minutes. Oil absorption values of 0.185 grams per square inch or more constitutes passage of this requirement; values less than 0.185 grams per square inch constitutes failure.
6..3. Tensile Strength Test: Testing of tensile strength and elongation may be done concurrently.
6.3.1. Dry Tensile Strength Test and Dry Elongation Test:
184.108.40.206. Test Specimens: Shall be cut from three (3) randomly selected wipers. One (1) specimen will be cut in the machine direction and one (1) in the cross direction from each wiper. Specimen size will be 2" x 6" with a 1/8" tolerance.
220.127.116.11. Two (2) measurements are required for calculating elongation, pretension and post tension. The test strip may be marked and measured longitudinally so as to define a given segment that will not be covered up when secured in clamping device. The segment should be as long as practicable, say 3-4". Measure this segment again while in full suspension. Alternately, the distance between the upper and lower clamps before and after tensioning may be used to calculate elongation.
18.104.22.168. Suggested Testing Apparatus: Shall consist of two (2) clamping devices with flat jaws at least two inches in width. One clamp shall be attached to a mechanism that suspends it in such a manner that jaws shall be parallel to the ground. The other clamp shall be weighted sufficiently to a total (clamp and weights) of ten (10) pounds ± 1 ounce and shall be used to tension the test strip.
22.214.171.124. Method of Testing: Using specimens defined in Paragraph 126.96.36.199. clamp a 2" wide test strip in the upper (secured) clamps jaws being careful to make the edge of the jaws perpendicular to the edge of the test strip so that the test strip will hang vertically. Attach the weighted clamp in a similar manner but in a 180 ° (opposing) position, taking care not to put the test strip in tension. Clamps should be tight enough to prevent slippage but not so tight as to weaken fabric. Approximately one (1) inch of fabric should be secured in the clamp's jaws. Lower the weighted clamp removing the slack from the test strip until it is fully extended but not in tension. Continue to slowly lower weighted clamp, being careful to minimize the effects of momentum, until the test strip breaks (failing test) or the weighted clamp is fully suspended (passing test). Failure of the specimen to support a total of ten (10) pounds constitutes failure of the specimen. The final elongation measurement shall be made at this time.
6.3.2. Wet tensile strength and elongation tests shall be conducted on similar sized specimens that have been immersed in water for three (3) minutes ± 10 seconds at 72 °F ± 2 °F and drained for 10 seconds as in the test for total absorption (See Paragraph 6.2.) Test strips should be tested within two (2) minutes ± 10 seconds of the conclusion of the required draining time. Failure of the wet specimen to support a total of ten (10) pounds constitute failure of the specimen.
6.4. Elongation Tests:
6.4.1. Dry Elongation Test: May be tested in conjunction with the dry tensile strength test.
188.8.131.52. Suggested testing apparatus and procedure is the same as for tensile strength test.
184.108.40.206. Determine percent of elongation by:
Final Measurement (Post-tension) x 100 = Percent of Elongation
Beginning Measurement (Pre-tension)
Values of 150% or less constitute passage of this requirement; values over 150% constitute failure.
6.4.2. Wet Elongation Test: May be tested in conjunction with the wet tensile strength test.
220.127.116.11. Suggested testing apparatus and procedure is the same as for the wet tensile strength test.
18.104.22.168. Use same procedures as in dry test substituting similar sized specimens that have been immersed in water for 3 minutes ± 10 seconds at 72 °F ± 2 °F and drained for 10 seconds as in the test for total absorption. Test strips should be tested within 2 minutes ± 10 seconds of the conclusion of the required draining time.
22.214.171.124. Determine percent of elongation by:
Final Measurement (Post-tension) x 100 = Percentage of Elongation
Beginning Measurement (Pre-tension)
Values of 150% or less constitute passage of this requirement; values over 150% constitute failure.
6.5. Tack Test:
6.5.1. Required Materials: Ten (10) 4" x 4" ± 1/8" squares of wiper material (cut from any number of wipers). Two (2) flat 4" x 4" ( ± 1/8") x 1/8" (approximately) metal plates plus sufficient additional weight which with one plate totals 5 pounds ± 1 ounce.
6.5.2. Test Procedure: Preheat oven to 150 °F ± 5 °F. Sandwich the ten (10) uniformly stacked test squares between the metal plates and place in oven with the 5 pound (weights + plate) on top. (Be sure the weight is evenly distributed.) Maintain test specimens at 150 °F for 20 minutes ± 2 minutes. Remove and immediately inspect for signs of adhesion between test squares or a tacky feel to the fingers. Such evidence of adhesion or tackiness constitutes failure.
7. INSPECTION: Products furnished under this specification shall be inspected by, or at the direction of the Commission and/or the ordering State agency either at the destination or place of manufacture.
8. PACKING / PACKAGING: Packing for shipment shall be in accordance with the manufacturer's standard practice and in a manner readily accepted by common carriers engaged in interstate commerce and as specified in the Invitation for Bids. Within the shipping carton, units shall be packed in a manner designed to minimize damage during shipment due to rough or improper handling.
8.1. Packing: Packing shall be in boxes sufficiently durable to protect the wipers from damage and deterioration during shipping handling, and storage. Boxes shall withstand stacking to a height of four (4) feet with no evidence of crushing, splitting, slipping, or toppling. Each box shall contain 1,000 wipers. (Bids based on a smaller box count will be accepted.)
9. PRODUCT LITERATURE: Bidder shall submit with each bid a complete and illustrated description of the products being offered.
10. MARKING / LABELING:
10.1. MARKING: Each shipping container shall be clearly marked with:
10.1.1. Name of contents.
10.1.3. Name and address of the manufacturer.
The container or shipping documents shall include:
10.1.4. Order number or contract number.
10.1.5. Name and address of ordering agency.
10.1.6. Agency requisition number.
11. COMPLIANCE: In order for consideration to be given to the bid on an item under this specification, the bidder must comply with the following conditions:
11.1. PRODUCT IDENTIFICATION: The make, model number, name of the manufacturer, brand or trade name, etc., as applicable, of the item which the vendor proposes to furnish must be stated as part of the bid.
11.2. EXCEPTIONS: Notwithstanding the above, any exception taken by the bidder to the requirements and conditions of this specification must be stated and described in detail as a part of the bid. If no exceptions or deviations are identified in this manner, the items must be furnished exactly as described herein.
11.3. PROOF: The bidder shall bear the burden of proof of compliance with this specification.
12. ORDERING DATA: When ordering a product conforming to this specification, the requisitioning agency must specify the following:
12.1. The title and number of this specification (735-20-01).
12.2. Total quantity of boxes required. (Each box represents 1,000 wipers.)
13. AVAILABILITY OF SPECIFICATIONS: Copies of this specification may be obtained by calling or writing:
Texas Procurement and Support Services
Austin, TX 78711-3047